You will never know what you can do untill you try!啥意思

和untill一起用的是一个短语:not.untill ,通常都是句子

c 因为有完成的意味在里面,并且前面是过去时,所以用过去完成时的的
飞机已经从天际消失,我仍然立在那.
这个题 矛盾之处在于站这个动作不是后于飞机消失然后才发生,而是一起在进行,并且飞机消失后还在进行着,所以我们可以理解成 飞机消失 是先于 站 这个动作的的,虽然之前也站在那,但后来 站 还持续着,后于飞机消失结束.这就是时间差,飞机消失有完成的意味,所以用过去完成时而不仅是过去时.

till和until都可以用作连词和介词,用于肯定句和否定句.用于肯定句时,只与持续性动词连用,有一个not...until的形式是固定的表示"到...为止".用于否定句时,通常与瞬间动词连用,也可与持续性动词连用,表示"直到...才"的意思.这两个词一般情况下可以相互换用.例如：
We waited for him until/till six o'clock.我们等他到一直等到六点钟.
The pupils will not begin the meeting till/until their class supervisor comes.学生们等到班主任一到就开始开会.
They didn't talk until/till the interpreter came.直到译员到,他们才交谈.
He did not go to bed until/till he had made sure that nothing was wrong with the pipes.他检查水管,确准它们没有毛病,才去睡觉.
当until用于句首时,一般不能用till代替.在以not开始的从句或短语里,till一般也不可代替until,而且这种句式要用倒装语序.例如：
Until the last minute of the match we kept playing.直到比赛的最后一分钟,我们仍然坚持奋战.
Not until he had finished his work did he go home.他直到把工作做完,才回家去.

The young man did not wake up until the bed had struck the ground.
是 not …… until…… 句型,表示直到……才……的意思,the bed had struck the ground 的动作在wake up的动作之前,wake up是过去式 所以had struck 是完成时
Every time he wanted to come into the garden he would bark until someone opened the gate.是说他会叫 直到到有人开门（叫到有人开门）
用过去式是要与前面的时态（ he wanted to come into the garden ）一致

1.I’ll let you know ____ he comes back.
A. before B. because C. as soon as D. although
2. She will sing a song ____ she is asked.
A. if B. unless C. for D. since
3. We will work ____ we are needed.
A. whenever B. because C. since D. wherever
4. Read it aloud _____ the class can hear you.
A. so that B. if C. when D. although
5._____ you go, don't forget your people.
A. Whenever B. However C. Wherever D. Whichever
6. It is about ten years _____ I met you last.
A. since B. for C. when D. as
7. They will never succeed, _____ hard they try.
A. because B. however C. when D. since
8. _____ still half drunk, he made his way home.
A. When B. Because C. Though D. As
9. _____ she was very tired, she went on working.
A. As B. Although C. Even D. In spite of
10. Busy _____ he was, he tried his best to help you.
A. as B. when C. since D. for
11. I learned a little Russian _____ I was at middle school.
A. though B. although C. as if D. when
12. _____ we got to the station, the train had left already.
A. If B. Unless C. Since D. When
13. _____ the rain stops, we' 11 set off for the station.
A. Before B. Unless C. As soon as D. Though
14. She was _____ tired _____ she could not move an inch.
A. so, that B. such, that C. very, that D. so, as
15. We didn’t go home _____ we finished the work.
A. since B. until C. because D. though
16. I'll stay here _____ everyone else comes back.
A. even if B. as though C. because D. until
17. Although it's raining, _____ are still working in the field.
A. they B. but they C. and they D. so they
18. Speak to him slowly _____ he may understand you better.
A. since B. so that C. for D. because
19. You'll miss the train ______ you hurry up.
A. unless B. as C. if D. until
20. When you read the book, you' d better make a mark _____ you have any questions.
A. at which B. at where C. the place D. where
21. We'd better hurry ______ it is getting dark.
A. and B. but C. as D. unless
22. I didn' t manage to do it _____ you had explained how.
A. until B. unless C. when D. before
23._____ he comes, we won't be able to go.
A. Without B. Unless C. Except D. Even
24. I hurried _____ I wouldn't be late for class.
A. since B. so that C. as if D. unless
25. _____ I catch a cold, I have pain in my back.
A. Every time B. Though C. Even D. Where
26. What's the matter _____ they still haven't answered the telegram?
A. when B. that C. though D. however
27. Bring it nearer _____ I may see it better.
A. although B. even though C. so that D. since
28. You may arrive in Beijing early _____ you mind taking the night train.
A. that B. though C. unless D. if
29. Helen listened carefully _____ she might discover exactly what she needed.
A. in that B. in order that C. in case D. even though
30. More people will eat out in restaurants _____ they do today.
A. than B. when C. while D. as
31._____ hard she tries, she can hardly avoid making mistakes in her homework.
A. Much B. However C. As D. Although
32. Poor _____ it may be, there is no place like home, _____ you may go.
A. as; wherever B. though; whenever
C. in spite of; when D. that; wherever
33. The child was __ immediately after supper.
A. enough tired to go to bed B. too tired to go to bed
C. so tired that he went to bed D. very tired, he went to bed
34. The history of nursing __ the history of man.
A. as old as B. is old than C. that is as old as D. is as old as
35. _____ born in Chicago, the author was famous for his stories about New York.
A. Since B. Once C. When D. Although
36._____ we stood at the top of the building, the people below were hardly visible.
A. As B. Although C. Unless D. In spite of
37. Scarcely was George Washington in his teens _____ his father died.
A. than B. as C. while D. when
38. _____ David goes, he is welcome.
A. Whichever B. However C. Wherever D. Whatever
39. The house stood _____ there had been a rock.
A. which B. at which C. when D. where
40. Small _____ it is, the pen is a most useful tool.
A. because B. so C. if D. as
41. After the new technique was introduced, the factory produced ____tractors in 1988 as the year before.
A. as twice many B. as many twice C. twice as many D. twice many as
42. The piano in the other shop will be _____, but _____.
A. cheaper; not as better B. more cheap; not as better
C. cheaper; not as good D. more cheap; not as good
43. John plays football _____, if not better than, David.
A. as well B. as well as C. so well D. so well as
44. Although he is considered a great writer,
A. his works are not widely read B. but his works are not widely read
C. however his works are not widely read
D. still his works are not widely read
45. ___ the day went on, the weather got worse.
A. With B. Since C. While D. As
46.—What was the party like?
—Wonderful. It' s years _____ I enjoyed myself so much.
A. after B. when C. before D. since
47. It was not _____ she took off her dark glasses _____ I realized she was a famous film star.
A. when; that B. until; that C. until; when D. when; then
48. If we work with a strong will, we can overcome any difficulty, _____ great it is.
A. what B. how C. however D. whatever
49. After the war, a new school building was put up _____ there had once been a theatre.
A. that B. where C. which D. when
50._____, Mother will wait for him to have dinner together.
A. However late is he B. However he is late
C. However is he late D. However late he is
51. He will come to call on you the moment he ____ his painting.
A. will finish B. finished C. has finished D. had finished
52. ____ difficult the task may be, we will try our best to complete it in time.
A. No matter B. No wonder C. Though D. However
53. It was ____ that she couldn’t finish it by herself.
A. so difficult a work B. such a difficult work
C. so difficult work D. such difficult work
54. The meeting didn’t start___ everyone was there.
A. because B. until C. why D. if
55. The boy ___ to bed ___ his mother came in.
A. went not; until B. didn’t go; after C. went; until D. didn’t go; until
56. I won’t believe you___ I have seen it with my own eyes.
A. before B. until C. after D. when
57. He ___ home ___ she was satisfied ___ his answer yesterday.
A. didn’t go; until; with B. wasn’t go; after; to
C. doesn’t go; before; with D. didn’t go; until; to
58. He ___ back until the work ___ done.
A. isn’t; will be B. isn’t; is C. won’t be; will be D. won’t be; is
59. They didn’t start the work ___ their teachercameback.
A. until B. while C. as soon as D. if

选择填空：
1-5 CADAC 6-10 ABCBA 11-15 DDCAB 16-20 DABAD 21-25 CABBA
26-30 BCCBD 31-35 BACDD 36-40 ADCDD 41-45 CCBAD 46-50 DBCBD 51-53 CDD
现在完成时与一般过去时的比较
（一）一般过去时态和现在完成时态的概念
一般过去时表示在过去某个时间发生的动词或存在的状态,也表示过去经常或反复发生的动作常与yesterday, yesterday afternoon, last year, in 1965, a moment ago 等表示过去的时间状语连用, 例如：
He came here yesterday.
现在完成时表示过去的动作（或状态）对现在产生的影响和结果, 例如：
He has broken his bottle.
(二)一般过去时态和现在完成时的区别：
1）现在完成时是表示过去的动作与现在的联系,主要说明的是现在的情况和状态；而一般过去时则强调动作发生在过去某一时间,与现在不发生联系, 例如：
We haven't seen him since last year.我们自从去年以来一直未见到他.（现在还未见到）
We didn't see him last year.我们去年没见到他.（现在不一定未见到）
2）现在完成时表示从过去发生一直持续到现在（包括现在）的某个动作或状态,与现在有关的时间状语连用,一般过去时表示过去某一特定（与现在无关）的时间,与具体的表示过去的时间状语连用, 例如：
He has lived here since he was born.自他出生以来一直居住在这儿.（since 自从…以来与现在有关,说明还居住在这儿.）
Liumei went to see her grandmother last night.刘梅昨晚去看了她外婆.（只说明昨晚）
（三）值得注意的几个问题：
1）动作发生在过去,一直持续到说话的时候,并且还在延续时,要用现在完成时,例如：
We have studied English for two years.我们学英语两年了.
2）指过去的经历,但没有表示过去的时间状语,要用现在完成时,例如：
I have been to Shanghai twice.我曾去过上海两次.
3）以when开头的特殊疑问句,要用一般过去时,例如：
When did you lose your pen ? 你什么时候丢了钢笔?
4）just (刚刚)与现在完成时连用,just now (刚才)与一般过去时连用,例如：
The train has just gone.火车刚刚离开.
5）since 作介词,后面跟时间名词一起作状语时,句子要用现在完成时；since 作连词,引导状语从句时,主句用现在完成时,从句用一般过去时.
He has worked in this factory since 1996.
I have known him since he was a child.
6）so far,in the last / past …… 与现在完成时连用,例如 ：
So far, many countries have sent up satellites into space.In the last 30 years , our lives have changed a lot.

（一）
1 According to the time table, the train for London ___ at seven o'clock in the evening.
A. was leaving B. has left C. leaves D. will leave
2 You should visit this part of the country when ___
A. spring will com B. spring comes C. It has been spring
D. It will be spring
3 You needn't hurry her. She ___ it by the time you are ready.
A. will have been finishing B. Would finish C. Will have finished
D. Will be finishing
4. We can go home when the ground ___
A. is drying B. has dried C. dried D. will dry
5. Obviously, he ___ a bad cold. He sneezes so often.
A. has B. has been C. had D. was
6. Darwin proved that natural selection ___the chief factor in the development of species.
A. has been B. had been C. is D. was
7. While Peggy ___, her brother is playing records.
A. reads B. is reading C. has read D has been reading
8. It's been a long time since I ___. How are you?
A. had last seen you B. saw you last C. have least seen you
D. last was seeing you
9. We ___ on it for several hours but we have not yet reached any conclusion.
A. work B. are working C. have been working D. have been worked
10. He said that he ___ for Shanghai the next day.
A. will leave B. has left C. would leave D. had left
（二）
1. This is the first time I ___ this kind of refrigerator.
A. saw B. have seen C. am seeing D. see
2. "As soon as I ___ home, I'll have a hot bath." He promised himself.
A. got B. will get C. have got D. am getting
3. He ___ this job before he moved into this city.
A. found B. had found C. was finding D. would find
4. "Has he finished the report?" "No, he knew that he ___ time to complete it by tomorrow.
A. wouldn't have B. won't have C. shall not have D. will not have
5. I think this time yesterday he ___ an English class in No. Three Classroom Building
A. had B. will have C. was having D. would have
6. By 2000, the university ___ 20,000 postgraduates.
A. will be trained B. trains C. will have trained D. would have
7. Since 1970 he ___ in this school and he loves this job very much. A. has worked B. has been working C. is working D. will be working
8. I don't like to be disturbed if I ___.
A. work B. will work C. am working D. have worked
答案：
（一）C B C D A C B B C C
（二）B C B A D C B C

转
till / until在表达方式和意义上的特殊性：until是till的强调形式,但是它们表达的意义是相同的,都表示"直到某时".不过,当主句是否定句时,它引出的意思是"直到（某时）（某动作）才（发生）" ,这时候常会出现"not until …"的结构,如果将 "not until …"的结构放在句首,那么主句要写成倒装句.例如：
He didn't go to sleep until 12 last night .
他昨晚直到十二点钟才睡觉.
They didn't realize their fault till we pointed it out to them .
直到我们向他们指出了他们的错误,他们才意识到.
Not until we pointed out their fault to them did they realize it .
直到我们向他们指出了他们的错误,他们才意识到.
但是,当主句是肯定句时,它引出的意思是"直到（某时某动作停止了）" .例如：
The students made much noise till the teacher came into the classroom .
直到老师走进教室学生们才停止了大声喧哗.
The young couple were very happy until they used up all their money .
那对年青夫妇直到花光了所有的钱才沮丧起来.
另外,until 可以放在句首而till则不行.我们可以说：Until they used up all their money,the young couple were very happy .我们却不可以说：Till they used up all their money,the young couple were very happy .
此两个连词意义相同.肯定形式表示的意思是"做某事直至某时",动词必须是延续性的.否定形式表达的意思是"直至某时才做某事".动词为延续性或非延续性都可 以.正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式.
肯定句：
I slept until midnight.我一直睡到半夜时醒了.
Wait till I call you.等着我叫你.
（在肯定句中可用before代替 Let's get in the wheat before the sun sets.）
否定句：
She didn't arrive until 6 o'clock.
她直到6点才到.
Don't get off the bus until it has stopped.
公共汽车停稳后再下车.
I didn't manage to do it until you had explained how.直到你教我后,我才会做.
1)Until可用于句首,而till通常不用于句首.
Until you told me,I had heard nothing of what happened.
直到你告诉我以前,出了什么事我一点也不知道.
2)Until when 疑问句中,until要放在句首.
---Until when are you staying?你呆到什么时候?
--- Until next Monday.呆到下周一.
注意：否定句可用另外两种句式表示.
(1）Not until …在句首,主句用倒装.
Not until the early years of the 19th century did man know what heat is.
直到19 世纪初,人类才知道热能是什么.
Not until I began to work did I realize how much time I had wasted.
直到我开始工作,我才认识到了我已蹉跎了几多岁月.
(2) It is not until… that…

对于爱情,除非我们满足,对于爱情,我们从学生变成朋友,对于爱情,我们成为无话不采取,因为爱,我们不会分别,为了爱,为了梦想,我们的努力.

till / until在表达方式和意义上的特殊性：until是till的强调形式,但是它们表达的意义是相同的,都表示"直到某时".不过,当主句是否定句时,它引出的意思是"直到（某时）（某动作）才（发生）" ,这时候常会出现"not until …"的结构,如果将 "not until …"的结构放在句首,那么主句要写成倒装句.例如：
He didn't go to sleep until 12 last night .
他昨晚直到十二点钟才睡觉.
需要注意的是：till多用于普通文体,而 until则用于多种文体,并且在句子开头时,用 until而不用till.

先指出贴主的错误..没有untill这个单词.正确的是until.
区别来说,简单的讲,till表示一直做某件事,直到什么条件发生,条件发生之后还会接着做下去.而until表示一直做某件事,待条件发生后不会接着做那件事了.

因为还没作出决定,但是一定会作出决定所以就用will

首先,是Until不是Untill.
其次,"我不会睡觉直到我妈妈回来"与"直到我妈妈回来我才睡觉"意思一样.英语翻译为"I won't sleep until my mom comes back."但是中文没有"我不会睡觉直到我妈妈回来",因为语序不当.

Not…until…句型尽管在某些情况下可与before互换使用,但在强调句中一般仍用until;
1).It was not until he told me that I knew it.直到他告诉我我才知道这件事.
2）.It was not until he finished his homework that he went home.直到完成作业他才回家.
3）放于句首时用until.
For example:
Antil he finished his homework ,he didn’t go home.直到完成作业他才回家.
应注意：在使用not until时,若not until放于句首,句子应部分倒装.For example:
Not until he finished his homework,did he go home.直到完成作业他才回家
琦姐用我的

肯定句是在句首 ,否定句not until后面是一般过去式

你这不都改好了么,正确啊
楼上的不对,make it 本身就是succeed成功的意思,不用后面再加successful了,你后面的确实是都改好了
1.succeed=make it 同义替换
2.前面加if,if后面变正常语态,将will 改成 would,跟前面时态一致,问号变句号,就可以了.

daily (每天)

楼下一语中的啊=.=

unless 是除非,until是直到,一般用not until 就是说直到.之前你不能做什么
这句话是说你不能去公共场所（ ）你至少24小时 没有症状（symptom-free）
语法上来说我就不太懂了.
如果说你要用直到,你得说直到24小时没有症状的那一刻吧?
语法肯定有解释,不过学英语嘛,还是语感最重要啦

意译:
我会一直爱你……
我爱你,直到天荒地老……

是的,后面改成have就好了,否则时态不搭配

不,可以分开用
not...until是直到...才
until是直到
e.g.他一直等到火车开动.
He waited until the train (stanted).=left
直到雨停他们才出发.
They didn't leave until the rain stopped.

I 'm not going to be waken up until noon nap has gone.我将直到午睡后才醒来 句型 not until直到……才 原句：I'am going to sleeping untill to wake myself.中应改成以下也可 I’m going to have a noon nap until I wake myself up.

not until 引起的时间状语置于句首时,句子的主谓应部分倒装.由 not until 引导的时间状语从句位于句首时,主句应部分倒装,从句语序不变.如：
Not until 1998 did he return to his hometown.
直到 1998 年他才回到家乡.
Not until Father came back did we begin to have supper last night.
昨晚直到父亲回来,我们才开始吃晚饭.
注意：当 not until 引导的状语或状语从句用于强调句型时,句子的主语不倒装.如将上两句改为强调句应为：
It was not until 1998 that he returned to his hometown.
It was not until Father came back that we began to have supper last night.

注意：
没有：untill,这是错的,只有：until和till
until 多用于not.until 的结构,也可单独使用；till和until的意思一样

not……until意思是“直到……才”,其中not也可以换成其他否定词比如该句中的no,不表否定,而是与until连用的固定搭配

我到现在才看清楚你是什么人!

这个句子应该是Don't trouble trouble untill trouble troubles you.
很多人都把这个句子理解成“不要自找麻烦,除非麻烦找上你.”也就是不要自找麻烦.
但是申小龙最新的《现代汉语》中提到了这一例句,说这句应该理解为“要主动去找麻烦,不要到麻烦找上门了才想办法”.“因为汉语句子的否定只针对最近的一个陈述,而英语句子的否定可以囊括句子包含的附加性陈述.”

他给秘书打了三次电话才被告知经理去开会了
not until.+倒装.直到.才.

正确的应该是stand by your side, end有名词和动词的意思指终结,结束.但是修饰life的应该是一个形容词,所以ended（结束的）才对

比较 until 和 till 的区别和用法此两个连词意义相同. 肯定形式表示的意思是"做某事直至某时", 动词必须是延续性的. 否定形式表达的意思是"直至某时才做某事".动词为延续性或非延续性都可 以. 正确使 用这两个连词的...

(表示时间)直到(某一时刻)
They talked till dawn.
他们一直谈到天明.
(表示时间)直到(发生某事)
It was not till 11 o'clock that he came back last night.
昨晚直到11点他才回来.
until用于表示动作、状态等的持续,可译为“一直到……为止”或“在……以前”.在肯定句中,它与表示持续性状态的动词连用,表示持续到某一时刻：
I’ll wait here until 5.我会在这里等到5点钟.
His father was alive until he came back.直到他回来为止,他爸爸都是活着的.
在否定句中,它通常与描述短暂动作的动词连用,表示“到……为止”、“直到……才”：
She cannot arrive until 6.她到6点才能来.
His father didn't die until he came back.直到他回来,他爸爸才死.

没人知道谁将是优胜者直到末端.虽然起初利用,她也许被击败.并且将是最后笑者的那取决于她的能力
在末端来之前,没人会知道谁将赢取.即使她有一阵子向前拉扯了已经,仍有她的可能性将被打.要看谁会笑终于,它取决于她是否有这能力

句型介绍
主句（含not的否定式）＋until时间状语从句
not...until...是表示“直到……才……”的句型.
1,主句中的动词都是短暂性动词；
2,时间状语从句中用一般现在时代替一般将来时；
3,一般来说,从句动作先于主句动作发生,如果要强调从句动作的完成状态,可以用完成时；
4,until 可以换作till
e.g.The baby did not stop crying untill he saw the toy.这个小婴儿直到看见玩具才停止哭泣.
特别提示
上面这个句型可以扩展成两个延伸句型：
not until +时间状语从句＋倒装后的主句
It is not until +时间状语从句＋that+主句
第一个句式是将否定性时间状语提前的倒装句式.
第二个句式是强调句,强调时间状语.
我们把上文的例句做下变形吧.
e.g.Not until he saw the toy did the baby stop crying.
e.g.It was not until he saw the toy that the baby stoped crying.

___这些问题得不到解决,研究行为的技术手段就会继续受到排斥,这是唯一的方法来解决我们的问题.
unless 直译“除非”
untill 直译“直到”
再结合题目的本意,就不难发现如果用untill就词不达意了,所以这里用unless.
e.g.1.Unless you give me the answer,or I dont't want to talk with you .
除非你给我答复,否则我不想跟你说话.

这两个词在实际应用中区别不大..
基本可以互换..
until
直到...为止
一般用于否定句,not ...until ...
表示"直到...才..."
不过也可以用在肯定句里,表示"直到什么时候".
until用在肯定句里的时候,意思和用法都和till一样.
例句与用法:
1.I didn't wake up until I heard the alarm clock.
直到听到闹钟的铃声我才醒来.
2.He lived in California until he was twenty.
他在加里弗尼亚一直住到20岁.
3.She was a bank clerk until the war,when she trained as a nurse.
她战前是个银行职员,战时受训当了护士.
4.Wait until the rain stops.
等到雨停了再说吧.
5.Continue in this direction until you see a sign.
一直朝著这个方向走就看见指示牌了.
6.The secret was never told until after the old man's death.
这个秘密在老人去世后才说出来.
7.I won't stop shouting until you let me go.
你不放我走我就一直喊叫.
8.Until she spoke I hadn't realized she was foreign.
她要不说话我还一直不知道她是外国人.
till
直到...
一般用于肯定句,和until在肯定句中的用法一致.
当它用于否定句时,和until在否定句中的用法也差不多.
1.People do not know the value of health till they lose it.
直到失去健康,人们才知道健康的可贵.
2.I'll wait till four o'clock.
我将等到四点钟.
3.We must stick to our task till it is finished.
我们必须继续工作,直至做好为止.
4.Not till then did I realize the danger of the situation.
直到那个时候我才感到形势的危险.
5.Never put off till tomorrow what you can do today.
今日事今日毕.
6.The people next door play their radio from morning till night.
邻居从早到晚开着收音机.
7.The meeting adjourned till five o'clock.
会议延至五点召开.
8.Gee,I can hardly wait till it's dark.
哎呀,我简直等不到天黑了.

爱是什么?它就是我们的生活

可以的.
until和till两者都可作介词、连词,一般情况下可以互换使用.用于肯定句时,主句的动词只用延续性的,它所表示的动作一直延续到till或until表示的时间为止,意为“直到……为止”；用于否定句时,主句的动词一般是非延续性的,也可以是延续性的,它所表示的动作直到till或until所表示的时间才发生,意为“直到……（才）”.

李一直在准备着（考前复习）,持续到去年一月,因此,他才能参加并通过研究生入学考试.so 应该理解为 因此、所以

我将永远记得今晚.它对我而言是如此特别.感谢所有人.我感到自己十分幸运.我知道没有什么不可以.我将竭尽全力.祝大家圣诞快乐.

c 这份工作很困难直到我习惯它才觉得不难

till / until在表达方式和意义上的特殊性：until是till的强调形式,但是它们表达的意义是相同的,都表示"直到某时".不过,当主句是否定句时,它引出的意思是"直到（某时）（某动作）才（发生）" ,这时候常会出现"not unt...

这就是真理:得到时不知道珍惜,失去才懊脑万分

基本相同,但句首一般不用till,而用until.
口语中用till较多,until在口语体及正式体文体中都使用.
注意,不要把until误写为untill.

Not…until…句型尽管在某些情况下可与before互换使用,但在强调句中一般仍用until; 1).It was not until he told me that I knew it.直到他告诉我我才知道这件事.2）.It was not until he finished his homework that he went home.直到完成作业他才回家.3）放于句首时用until.For example:Antil he finished his homework ,he didn’t go home.直到完成作业他才回家.应注意：在使用not until时,若not until放于句首,句子应部分倒装.For example:Not until he finished his homework,did he go home.直到完成作业他才回家 琦姐用我的

not untill

这是一个将时间状语 not until the 11th century 提到句首的句型,句子要倒装.
句子原来的顺序是：The custom didn't reach Europe until the 11th century when a young lady brought a fork to Italy.将 not until 提前后,主句变成：Not until the 11th century did the custom reached Europe...原句中 when a young lady brought a fork to Italy 是时间状语从句作为插入语.因此要选 C（其中 reache 应为 reach）.

用arrives,因为这是时间状语从句,“主将从现”,until 引导的从句用现在时

untill

We can't buy books until the book store opens.
We can't buy books before the book store opens.
We can buy books after the book store opens.
请指出,希望能和你一起探讨~
如果认为我的回答好的话,请及时采纳,

till / until在表达方式和意义上的特殊性：until是till的强调形式,但是它们表达的意义是相同的,都表示"直到某时".不过,当主句是否定句时,它引出的意思是"直到（某时）（某动作）才（发生）" ,这时候常会出现"not until …"的结构,如果将 "not until …"的结构放在句首,那么主句要写成倒装句.例如：
He didn't go to sleep until 12 last night .
他昨晚直到十二点钟才睡觉.
需要注意的是：till多用于普通文体,而 until则用于多种文体,并且在句子开头时,用 until而不用till.例如：
在他回来之前,什么也不能做.
Until he comes back,nothing can be done．（√）
Till he comes back,nothing can be done．（×）

基本一样.
not until连一起,一般起强调作用,通常有强调句式.