从句结构问题研究He is __________ is known as a hacker（黑客）——he likes

主从句相同之处：都有谓语,即有时态的动词.
主从句的区别是：
1、从句由that、which、what、how等关联词引导,主句则不需要.
2、从句可以有多个,主句只有一个.
What he wants to tell us is not clear .
先定位从句数目：
本句有wants、is两个谓语（有时态的动词）,说明有一个主句一个从句.（注意,to tell是非谓语动词,没有时态,不能做谓语.）
再看关联词：
what在哪个动词前起引导作用（近水楼台先得月）,what在两个动词前,但离wants最近,所以what he wants to tell us是从句.
最后检查主从句的完整性：
what he wants to tell us.主谓宾补,从句完整.is not clear.（主）系表,主句不完整,缺主语.所以what he wants to tell us是主语从句,充当is not clear的主语.
提高：
谓语动词：有时态的动词.一个主句或从句,一般只有一个谓语动词（除非有and、or等连接）,其他动词要用非谓语形式.
非谓语动词：现在分词 -ing
过去分词 -ed
不定式 to do

不可以
学习" if " 引导的条件状语从句的用法,现在总结一下:
if 条件句不一般,几个要点记心间;
条件句,放在前,逗号要放句中间.
条件句表可能,主句多用将来时；
条件句表事实,主句常用现在时.
在 if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态.如：
We can walk there if we can't find a bus .
If it rains tomorrow ,we will not go to the zoo.
What will you do if you find a panda in danger.
如果 if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态.如：
If bears are in danger ,they attack people.
注意 ：
在 if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若 if 条件句放句首,
从句后面要加逗号,和主句隔开.
还要注意前后时态一致原则

一个主句,两个定语从句.
主句是brick-and-mortar is a traditional "street-side" business
从句 that deals with its customers face to face in an office or store 修饰business,
从句 that the business owns or rents 修饰office or store

when 引导的时间状语从句 主句用一般将来时,从句一般现在时表将来
I don't know when he will come when 引导的宾语从句
when he comes ,I will tell you when 引导的时间状语从句
if 也有这样的用法

Until用法详解表示“直到……为止”,两者常可换用,只是 until 比 till稍正式,所以在正式文体中,一般用 until,而在口语或非正式文体中则两者都可用.从其后所接成分来看,till多与名词或较短的从句连用,而较长较复杂的成分多用 until,位于句首时也多用 until.
两者在用法上应注意以下几点：
1.相关主句谓语必须是持续性动词,若是终止性动词,则应为否定式（因为终上性动词一旦被否定就成为状态,便可持续）.如：He waited until she was about to leave.他等着一直到她准备离开.She didn’t marry until she was over fifty.她直到50多岁才结婚.
2.引导时间状语从句时,其谓语要用现在时表示将来意义.如：I won’t leave until he comes back tomorrow.我要等他明天回来后再走.Continue in this direction until you see a sign.一直朝着这个方向走就看见指示牌了.
3.有时其后可跟副词或介词短语等.如：He has been ill until recently.他最近一直生病.Until when are you going to stay here?你在这儿要待到什么时候?We didn’t eat till past midnight.直到午夜过后我们才吃饭.She won’t go home until after the exam.她要考完试之后再回家.如果语境的需要,有时甚至可以接带有“引导词”的从句.如：Don’t leave until after I’ve spoken to you.我和你说完后再离开.
4.用于 not…until [till]…结构
(1) 若主句动词为终止性动词,其意为“直到……才……”；若主句为持续性动词,其意为“不到……就……”.比较：They didn’t find her till the next day.他们直到第二天才找到她.He didn’t wait until I returned.他没等到我回来（没等我回来他就走了）.有时 until 或 till 可以换成 before.如：Until [Before] you told me,I had no idea of it.在你告诉我之前,我对此一无所知.（即直到你告诉我,我才知道）
(2) 可用于It is (was) not until [till]…that…这样的强调句型.如：It was not until I met you that I knew real happiness.直到我遇到你以后,我才真正体会到幸福.It was not until she took off her dark glasses that I realized she was a famous film star.直到她取下墨镜,我才意识到她是一位著名影星.
(3) 若将not until [till]置于句首,其后的主句要用倒装语序.如：Not until much later did she learn who her real father was.她很久以后才知道她真正的父亲是谁.Not until he received her letter did he fully understand the depth of her feelings.他直到收到她的信之后才充分理解她的感情有多深.

【答】吴雅琪,很多同学曾经问过这个问题.so that可以用来引导目的状语从句,相当于in order that,目的状语从句里常用情态动词may,can,might或could表示目的.如：x0dI shall write down your name so that I can keep in touch with you later on.x0dThey climbed higher so that they might get a better view.x0d上两句中的so that都可以替换成in order that.在现代英语中,这样使用时,so that中的so还可以省略,以上面的第二句为例,可以改写为：x0dThey climbed higher in order that they might get a better view.x0dThey climbed higher that they might get a better view.x0dso that也可以用来引导结果状语从句.虽有似曾相识的感觉,不能把目的状语从句和结果状语从句混淆.比较下面两个句子的意义和结构,就很容易区别了.x0dHe spoke at the top of his voice so that the students at the back could hear him.他说话声音很高,为的是后面的同学能听见.(目的状语从句）x0dHe spoke at the top of his voice,so that the students at the back heard him.他说话声音很高,结果后面的同学都听见了.(结果状语从句)x0dso that引导的结果状语从句一般要用逗号和主句隔开,从句里没有表目的的情态动词may,can,might或could.x0d总之,无论so that引导目的状语从句,还是引导结果状语从句,都通常位于句中,而不置于句首.

是,指代塞满嘴食物这件事

时间状语从句是复合句型,要求主句和从句时态呼应
主句是过去时,从句也必须是过去某种时态,不可以用一般现在时
话说,楼上仁兄的例句
“My teacher told us that the sun reses in the east”是时间状语从句?

宾语从句中都要用陈述语序.
但有两种情况比较特殊,但也符合陈述语序：
1：What's wrong(the matter) with you?
Which the way(answer) to the...?
例What's wrong with with the little boy?(she asked)
She asked what was wrong with the little boy.
2：对助于或部分主语提问所得到的特殊疑问句.
Whose mother is the best at playing the violin?(we didn't know)
We didn't know whose mother was the best at playing the violin.

what is the matter很多人都认为这个宾语从句被倒装了,实际不是的.what was the matter 其实就是sth. was the matter, what 在宾语从句中已经是作主语的了,符合陈述语气.

what is he? 中HE是主语,所以变陈述句时是：to what he is .
希望对你有帮助!

仅仅指的主句和从句所指的时间不一致,并不是必须一个与过去相反一个与现在相反.多看些例句,

句子中起名词作用的句子叫名词从句 (Noun Clauses）。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
17.1 引导名词性从句的连接词
引导名词性从句的连接词可分为三类：
连接词：that,whether,if 不充当...

没错,as you can的确是比较状语从句.
当然,还有省略这一语法,即：as you can = as you can save
如果对你有所帮助,请点击我回答下面的“选为满意回答”按钮,

If you work hard, you'll learn English well

We may define chemistry as a science, in the science we deal with the chemical change. As a result of the chemical change, it is possible to form a new substance.这里是两个定语从句,把先行词还原出来就差不多可以明白了.which 替代的是化学变化,it 就成了一个形式主语,指代的也是那个化学变化 不要纠结到底是什么成分,句子理顺弄懂对了就行吧,一般不会问你哪个是状语哪个是补语吧,又不是搞研究的. 我是那样理解的,不知道对不对也不知道你能不能理解了.

不一样,是得,前面是表从,后面是同位语从,前面译为事实是...,后面译为...这个事实.
如：I don't love you.The fact is that I love your brother.我不爱你.事实是我爱的是你哥.
The fact that she doesn't love me breaks my heart.她不爱我这个事实伤透了我的心.

这句子意思是,一个梦想并不够,尤其是对于那些深爱和关心自己身边的人来说.
全句是一般现在时态.
One dream is not always enough,明显主系表.主语One dream,表语 enough,表示足够的.
especially for a person who loves and cares for his people.who 引导的是定语从句.补充说明a person是什么样的person呢,是loves and cares for his people的人.
One dream is not always enough for a person who loves and cares for his people,这样改也是对的.

同学,很高兴回答你的问题
正确答案如下：
1.He asks .Can Tom play the guitar?
He asks ( if ) Tom ( could ) ( play ) the guitar.
2.Could you please tell me .Where did they live last year
Could you please tell me ( where ) they ( lived ) last year
3.He says ...It’s important to study English well .
He says ( it ) ( is ) important to study English well .
4.Jim asks me ...What does your mother do every day
Jim asks me ( what ) my mother ( does ) every day .
5.Doesn’t he tell you ...Where does he come from
Doesn’t he tell you ( where ) he ( comes ) from
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
不明白请继续追问,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1.The question is when we will start.2.I don't know where I should go.3.He showed me how I should use a computer.4.Nobody told us whatwe should do.

可以并存.
如：What he discribed was a computer which/that we didn’t know how to use at that time.
What he discribed 主语从句
was a computer系表结构
which/that we didn’t know how to use at that time.定语从句,修饰先行词a computer
因为我打拼音,把【主语从句】错写成了【状语从句】.

这个.我觉得既有主语从句也有表语从句啊,他们互相矛盾吗?
主语--有从句成分--主语从句
表语--是从句--表语从句
但实际区分过程中还要注意句子成分.关于主语从句和表语从句的定义可以考虑百科（假如还不懂就得去回顾一下句子成分与从句的分类.）
until/till
before他们的区别我觉得我不是太能表达出来.
这里就用引自某词典网站的英文释义--
Until释义：
conj
1.up to the time that or when; till:He read until his guests arrived.
2.before (usually used in negative constructions):They did not come until the meeting was half over.
这个英文释义可以解释楼主的疑问吗?牛津没带在身边没有所以没用它的释义.
有时候英文释义要比中文好理解.

条件状语从句包括真实条件句和虚拟条件句（也叫虚拟语气.
1.真实条件句是和事实相符的假设.
If he comes,I will call you.
虚拟条件句适合事实相反的假设.
If I were a bird,I would fly.
2.二者的动词形势不一样.
(具体的动词形式语法书上都有）

你可以使用下面的方法区分：
方法一：用关系代词,还是关系副词完全取决于从句中的谓语动词.及物动词后面无宾语,就必须要求用关系代词；而不及物动词则要求用关系副词.例如：
This is the mountain village where I stayed last year.
I'll never forget the days when I worked together with you.
判断改错（注：先显示题,再显示答案,横线；用不同的颜色表示出.）
（错） This is the mountain village where I visited last year.
（错） I will never forget the days when I spent in the countryside.
（对） This is the mountain village (which) I visited last year.
（对） I'll never forget the days (which) I spent in the countryside.
习惯上总把表地点或时间的名词与关系副词 where,when联系在一起.此两题错在关系词的误用上.
方法二：准确判断先行词在定语从句中的成分(主、谓、宾、定、状),也能正确选择出关系代词/关系副词.
例1.Is this museum ___ you visited a few days age?
A.where B.that C.on which D.the one
例2.Is this the museum ____ the exhibition was held.
A.where B.that C.on which D.the one
答案：例1 D,例2 A
例1变为肯定句：This museum is ___ you visited a few days ago.
例2变为肯定句：This is the museum ___ the exhibition was held.
在句1中,所缺部分为宾语,而where,that,on which都不能起到宾语的作用,只有the one既做了主句的表语,又可做从句的宾语,可以省略关系代词,所以应选D.
而句2中,主、谓、宾俱全,从句部分为句子的状语表地点,既可用副词where,又因 in the museum词组,可用介词in + which 引导地点状语.而此题中,介词on 用的不对,所以选A.
关系词的选择依据在从句中所做的成分,先行词在从句中做主、定、宾语时,选择关系代词 (who,whom,that,which,whose)； 先行词在从句中做状语时,应选择关系副词 ( where 地点状语,when 时间状语,why 原因状语) .

I．从下列A、B、C、D中选择一个正确选项填空.
1.I don't know _________ he will come tomorrow._________ he comes,I'll tell you．
A.if; Whether B.whether; Whether C.if; That D.if; If
2.I don't know _________ the day after tomorrow.
A.when does he come B.how will he come
C.if he comes D.whether he'll come
3.Could you tell me _________ the nearest hospital is?
A.what B.how C.whether D.where
4.Could you tell me _________ the radio without any help?
A.how did he mend B.what did he mend
C.how he mended D.what he mended
5.I want to know _________.
A.whom is she looking after B.whom she is looking
C.whom is she looking D.whom she is looking after
6.Do you know where _________ now?
A.he lives B.does he live C.he lived D.did he live
7.Do you know what time _________?
A.the train leave B.does the train leave C.will the train leave D.the train leaves
8.I don't know _________.Can you tell me,please?
A.how the two players are old B.how old are the two players
C.the two players are how old D.how old the two players are
9.The small children don't know _________.
A.what is their stockings in B.what is in their stockings
C.where is their stockings in D.what in their stockings
10.I can't understand _________.
A.what does Christmas mean B.what Christmas does mean
C.what mean Christmas does D.what Christmas means
II.按要求转换句型.
1.Does Mr.Brown enjoy living in China?Could you tell us?（改写句子）
→Could you tell us _________ Mr.Brown _________ living in China?
2."Does the girl need any help?” he asked me.（变为复合句）
→He asked me _________ the girl _________ some help．
3.Jim is not a student.Tom is not a student,either.（合并为一个句子）
_________ Jim _________Tom is a student.
4.When does the train leave?I want to know.（改为含宾语从句的复合句）
I want to know _________ the train _________.
5.They went home after they had finished their homework.(用not．．．until改写)
They _________ go home _________ they had finished their homework．
6.Did Peter come here yesterday?Li Lei wants to know.(改为含宾语从句的复合句)
Li Lei wants to know _________ Peter _________ here yesterday.
宾语从句专项训练参考答案：
I.1—5DDDCD 6—10ADDBD
II.1.if／whether; enjoys 2.if／whether; needed 3.Neither; nor 4.when; leaves
5.didn't; until 6.whether; came

不是,应该是I still missed the hometown which/ that is in.the distance.后面是which/ that引导的定语从句

这的的确确是个表语从句 no longer做的不是表语,而是状语,真正的表语是what引导的表语从句.

条件状语从句
unless=if not
引导让步状语从句的连词主要有以下这些：though, although, as; even if, even though; whether...or...; no matter+疑问词,疑问词-ever.
条件状语从句
要点： 表示状语从句由连词if, unless (=if not) 引导.
1.If it doesn’t rain tomorrow, we will go hiking.
如果明天不下雨, 我们就去远足.
2.You will get good grades if you study hard.
如果你努力学习,就会取得好成绩.
3.I will go to the party unless he goes there too.
我不会去参加聚会的, 除非他也去.(如果他不去,我也不去.)
4.You will be late unless you leave immediately.
如果你不马上走,你将会迟到的.(=If you don’t leave immediately, you will be late.)

表语亦称补语说法是对的,它属于主语补足语.
主语补足语是说明主语的状态、方位、地点、形状等等特点的,是表示主语是什么样的,所以又叫做表语.

this kingdom represents 这个定语从句之所以用一般现在时主要是侧重陈述一个客观事实,过去是这样,现在仍然如此
请在客户端右上角评价点“满意”即可,

难道是what you were doing
有点别扭,但有种解释是,第一句是感叹句,你在做什么啊!下面改后变成,你知道自己在做什么吗?!

答案是C since 是既然的意思
A for 一般后面接名词 就拿这句句子来说 应该是
For your objection
B that 后面接从句 但是句子意思不对
D so 因此的意思 句子意思不对

句1中,when 引导一个宾语从句作介词on的宾语,在主个宾语从句中,that用于引导一个从句在宾语从句中作主语,前面的it是代替这个主语从句放在句首作形式主语.
句子大意：现在,世界的焦点都在全球经济什么时候恢复正常.
句2中有两个that,第一个that引导一结果状语从句,在这个结果状语从句中,what引导一个宾语从句作to work out的宾语,从而构在不定式短语在从句中作主语,前面的it代替不定式短语作形式主语.在what经导的宾语从句中,that引导主语从句在这个宾语从句中作主语,前面的it代替它作形式主语.
句子大意：他书写得太乱了以致于很难猜出他想表达什么
英语讲究句子后重,当以that引导的从句作主语时,或不定式短语,或动名词短语作主语时,通常用it放在句首作形式主语,而把真正的主语放在句未.

后面基本上接to do.从句可用虚拟语气

定语从句和状语从句
很好分
定语从句里的WHICH所要修饰的是前面的某个名词,
而状语从句根本不起修饰某个名词的作用,而是补充说明以何种方式,在什么时间,地点场所等等,进行动作

若who后是动词,它就在宾语从句中充当宾语例如：I dont know who will go there with me .who 在从句中做主语.He asked her who she had read the book with .who 后有主语she ,who在宾语从句子中当介词with的宾语.

对 ;was是引导特殊疑问句的.一般疑问句就是由动词或者助动词直接带出.

要变,因为发生在过去

1.D.what
第一句是由what引导的宾语从句----what we read on the Internet.,做前面介词of的宾语.
2.B.which
这是由which引导的非限制性定语从句,修饰前面整个句子The fallen leaves covered the streets.

.as.as. 表示. 和.一样.;
...than.表示.比.

不算

有些表示时间的名次性短语可以充当引导时间状语的引导词
如any time 任何时候
you can come to me any time you came to beijing.

These are the reasons why we do it.
这些就是我们为什么要做这事的理由.

可以.连词后面可以省略 作主语的人称代词+be动词

从句之前都有个成分引导
we will go for a walk if there is no rain tomorrow.
像这句,主句是we will go for a walk
从句是there is no rain tomorrow,它由if引导
而且if是“如果”的意思,表假设,所以这是条件状语从句.
如果你完全没了解过,还是看语法书较具体

主语 the news
谓语 is
表语 full of stories about teenagers in trouble whose parents hardly know anything about their problems.
其中 about teannagers in trouble...定语修饰stories
in trouble 修饰teenagers
whose parents..定语从句修饰teenagers
【俊狼猎英】 欢迎追问

xx从句就在这个句子在整个句子当中充当xx成分.定语就相当于一个形容词,起到修饰,限定的作用.所以定语从句就是修饰被修饰词.没有宾补,谓语从句的,因为一个句子不会充当得这些成分.

原级、比较级、最高级,都可以简单的理解为比较状语从句
只是需要注意引导词就可以了
as...as../not so as...as (原级)
more...than..（比较）
the most ...in/of （最高）
the +adj+est...of/in
one of the +名（复）..

只能是that

一般来说要加关系词,例如 This is the place where he proposed to me. 这是他向我求婚的地方.主句是this is the place. 从句是he proposed to me.
当关系词在从句中作宾语时可以省略,例如 This is the story he told me. 这是他跟我讲的故事.主句是this is the story, 从句是he told me ( the story).
加逗号只有一种情况：非限制性定语从句时加逗号,例如 The story, which is told by him, is a fake one. 他跟我讲的故事是假的.主句是The story is a fake one.从句是(the story) is told by him.

that 在名词性从句中（主语、宾语、表语、及同位语从句）不充当成分；
在定语从句中,充当主语、宾语或表语.