If only the letter ( ) there in time. A. arrives B. is arriv

Unlike so many pundits who would have you believe gas would instantly go back to$ 1.13 a gallon if only bernanke would raise the fed funds rate a little bit, grantham has no illusions about easy fixes bringing happy days back here again--at least not for long
His latest suggestion is to short new york-listed chinese stocks if only he could get his hands on them

1.C 2.答案正确 3.B 因为A答案中no意思是介意,please not 意思别用我的电脑,前后矛盾,答案c让人迷惑,不知道让用还是不让用.答案D中sure此处意思是当然介意,my pleasure指很高兴这样做,前后不一致

C

意思不一样,后者常用

选择C
if only
adv.
1.要是 (表示虚拟语气,动词的时态要用过去时,be动词一律用were.如果动作本身就发生在过去,那就要用过去完成时.)
If only it hadn't!
要是没有登就好了!
If only I could swim.
要是我会游泳该多好.
If only I were rich.
但愿我很富.
If only she would come!
如果她能来就好了!
If only I had seen it.
要是我看见就好了.
If only someone could help me!
有谁能帮助我就好了!
2.(表示强烈的愿望) 但愿,真希望,只要...就好了：
If I only knew!
要是我知道该多好.
If only he will!
他愿意就好了!
Oh,if only he will!
要是他愿意就好了

a
虚拟语气
与过去相反

B

你就记住.虚拟语气表示与事实相反.与什么时候的事实相反,就往过去推一格.比如,与现在事实相反,就用一般过去式.与过去事实相反,“过去的过去” 叫做 “过去完成时” had done.但是will的过去完成时是will 的过去时would和完成时have done 的结合.所以是would have done.
然后题目就好解了.
第一句是与过去的事实相反.所以用过去完成时.所以had read 是对的.但是would要变成would have enjoyed.
第二题.根据句意,如果在我参加讲座之前就读过这本书就好了.参加讲座是过去的事.所以又是与过去事实相反.所以主句谓语应该是过去完成时had read
第三题.which establish his reputation in a way he would never consider possible.的意思是 以一种他永远也想不到的方式享有盛誉.梵高已经死了,所以又是与过去事实相反.所以用will的过去完成时would have considered
恩,一头汗..上面都是我手工制作的帮你理解的东西.下面是官方的语法点.供你参考.
1） 概念
虚拟语气用来表示说话人的主观愿望或假想,所说的是一个条件,不一定是事实,或与事实相反.
2） 在条件句中的应用
非真实条件句表示的是假设的或实际可能性不大的情况,故采用虚拟语气.
2.非真实条件句
1）时态：可以表示过去,现在和将来的情况.它的基本特点是时态退后.
a.同现在事实相反的假设.
句型 ：条件从句 主句
一般过去时 should/would/could/might+动词原形
If they were here,they would help you.
b.表示于过去事实相反的假设.
句型：条件从句 主句
过去完成时 should/would/could/might have+ 过去分词
If she had worked harder,she would have succeeded.
The rice would not have been burnt if you had been more careful.
If my lawyer had been here last Saturday,he would have prevented me from going.
If he had come yesterday,I should / would have told him about it.
含义：He did not come yesterday,so I did not tell him about it.
If he had not been ill and missed many classes,he would have made greater progress.
含义：He was ill and missed many lessons,so he did not make greater progress.
c.表示对将来的假想
句型：条件从句 主句
一般过去时/were+ 不定式/should+ 动词原形 should/would/could/might+ 动词原形
If you succeeded,everything would be all right.
If you should succeed,everything would be all right.
If you were to succeed,everything would be all right.
if only则表示"如果……就好了".
If only the alarm clock had rung.当时闹钟响了,就好了.

If only 3 days left,i will do what I want to do ,such as stay with my families and my friends.I will go to somewhere I want to go,and…that's too much I want to do.I won't waste time!
For me,i think the most important thing we should is to work hard.But we adults usually forget the important of time.Today more and more students fall in love with computers games.They don't put their heart into study.I hope they can know the importants of study.Do their best as possible as they can.Cheer up,plese.I hope every one can do what they should do from now on for their future.

D

考查虚拟语气。如果前几天我能看到现在！那么我就不会感觉如此担心了。条件从句中对过去的虚拟用过去完成时态，故选D。

only if表示"只有"；if only则表示"如果……就好了".If only也可用于陈述语气.
I wake up only if the alarm clock rings.只有闹钟响了,我才会醒.
If only the alarm clock had rung.当时闹钟响了,就好了.
If only he comes early.但愿他早点回来.
辨析only if 与 if only
only与if这两个单词随意组合,可以组成两个意义相近,但用法不尽相同的短语only if与if only.现将它们的具体用法辨析如下：
一、only if意为“only on the condition that,as long as”,“只要；假如”.它用于陈述事实或必要的条件,比if所表达的语气更强烈.
You'll pass this course only if you study.只要你学,你就会通过这门课.
Children may enter the club only if they are accompanied by adults.只要孩子们有大人陪同就可以参加俱乐部.
The students at the university can take up part-time job only if it doesn't interfere with their studies.只要不影响学业,这所大学的学生可以从事兼职工作.
二、if only则有两种含义.第一种含义与only if近似,意为“as long as”,“只要”.例如：
If only it clears up,we'll go.只要天一放晴,我们就去.
第二种则是“expressing a wish or assumption”,“但愿；如果……就好了”.它用来表达一个不可能实现的愿望或假设,句子要用虚拟语气.例如：
If only she would come!要是她能来就好了!
If only you had told me you had a spare ticket for the show.如果你告诉我,你多了一张演出票就好了.
If only you had worked with greater care!你要是工作更仔细一些该多好!

都不对.
had listened比较靠谱.我觉得是不是你打错了……

1.是的.用一个例子概括你看：
以你要求的几种时态的虚拟语气：我要是在这儿就好了.
现在时：If only I were here.
过去时：If only I had been here.
将来时：If only I would be here.
动词向前推一个时态.
2.不对,还可以用who,whom,whose,只不过可以省略
比如：
.--where is your english book?just see what a mess in your schoolbag!
--The one whose cover is red,it’s easy to find anyway .
The one (whom)you referred to is my son. 你指的那个人是我儿子
The one (that) you bought is much better.你买的那个比较好.
这里面省略了做宾语的引导词that /which/who(m),
3.不是,比如：I'm feeling better nwo.我现在感觉好点了.feel不就是用正在进行了.
相信我,我是英语六级,英语老师,嘿嘿.

IF ONLY,“只要”if only i had enough money ,i will buy that car.(用这个词组的时候,要用虚拟语气)
你一般什么时间去逛街?when do you go shopping?(一本现在时表经常的动作)
你晚上最晚玩到几点?can you tell me the final time you will go back at night?

if only i was not so busy
if only i had her telephone number
if only it does not rain
if only i had taken a taxi
if only he had reviewed the lessons that teacher said in the class
希望能帮上忙

C

题目中的第一句话表示的是现在真实的情况，而第二句话中所要表达的是应该做但事实上没有做的事，这种情况导致第一句话中真实情况的发生，故if only条件句假设的是过去一种情况，因此应该用had+过去分词，所以正确答案是C。

If only these forests and the wild animals inside will last forever.


首发回答,希望我的回答帮得到您,来自【百度懂你】团队,

as long as 是只要
I don't care who you are,as long as you help me I will be grateful.
我不管你是谁,只要你帮助我我都会感激的
if only 是如果,可是带有一种奢望
If only I had a twin brother,that would be fun!
如果我有个双胞胎兄弟,那将会多好玩啊!

B REMEMBER 是没完成时态的用法的,而且从语法上讲你对过去的过去理解不对,这句话正确语法理解是第一个时间是过去式,THEN 这里是过去将来时 而不是你理解的前面是过去的过去用过去完成时
REMEMBER 一般不可以使用完成时
如果从解题角度,REMEMBER不能用完成时 就可以完成这题了,如果语法上不懂可以再问

even if 即使
as if 就好像,仿佛
if only 要是...该多好啊
例：If only I had worked harder!
要是我更加努力一点该多好啊!
only if 只有当...才
例：Only if you work hard can you succeed.
只有当你努力了你才能成功.

if only在一起用的话意思是要是..多好,而分开的话,就表示这两个单词单独的意思了即：如果你只是说你爱我

if only: 要是...多好
Examples:
1. If only he had been here.
要是他当时在这儿就好了。
2. I dread the coming exams. If only I could have time to review my lessons.
我对即将到来的考试非常担心。如果我有时间复习该有多好啊。
3. If only I had another chance.
要是我再有一次机会就好了。
4. I am so tired. If only I can take the day off tomorrow.
太疲倦了。如果明天能不上班多好。
5. If only problems would come one at a time!
要是问题一次只发生一个该多好！
6. If only it clears up, we'll go.
只要天一放晴,我们就去。
7. If only one had an unlimited supply of money!
要是财源不断就好了！
8. She would be a very good player if only she could get it together.
她若能控制得当就能成为很好的选手.

only if:
conj. 只有当(只是在...的时候)
Examples:
1. The company will succeed only if it have sufficient backing.
只有当该公司获得足够的资助，它才会成功。
2. A compound proposition that has components joined by the word and or its symbol and is true only if both or all the components are true.
综合命题由和或其符号所连接的子句组成的复合命题，只有当所有子句为真时，该句才为真
3. I can buy the house only if a mortgage for 2000 dollars is available.
只有拿到两千美元的抵押贷款，我才买得起那栋房子。
4. Only if I get a job will I have enough money to go to school.
我只有找到了工作才有足够的钱上学。

C

考查虚拟语气。If only="I" wish后面的句子使用虚拟语气，如果与现在将来相反，就使用过去时；如果与过去相反就使用过去完成时，本题的last week是过去时间，所以与过去时相反，用过去完成时。句意：要是我在上个星期的演讲比赛中更有自信就好了。

在这句话里would绝对不可以省略,if only 是典型的虚拟语气的标志,表示的是推测的意思,所以后面的动词前要加would,这个是绝对不能够省略的,具体情况要具体分析,有普遍性,也有特例,但一般尽量不要省略为好

if only 用于虚拟语气，表示“要是...就好了” If only one had an unlimited supply of money! 要是财源不断就好了！（与现在事实相反） only if 意思“仅仅如果”，用于引导条件状语从句。

if only
adv.
1.要是 (表示虚拟语气,动词的时态要用过去时,be动词一律用were.如果动作本身就发生在过去,那就要用过去完成时.)
If only it hadn't!
要是没有登就好了!
If only I could swim.
要是我会游泳该多好.
If only I were rich.
但愿我很富.
If only she would come!
如果她能来就好了!
If only I had seen it.
要是我看见就好了.
If only someone could help me!
有谁能帮助我就好了!
2.(表示强烈的愿望) 但愿,真希望,只要...就好了：
If I only knew!
要是我知道该多好.
If only he will!
他愿意就好了!
Oh,if only he will!
要是他愿意就好了

选c.if only 意思是:要是...就好了,与IF区别非常大.常见用于If only one had an unlimited supply of money!
要是财源不断就好了!
If only it clears up,we'll go.
只要天一放晴,我们就去.
而on contition that==if,意思是如果.如
I'll come on condition that John is invited too.
如果约翰也受到邀请,我就来.
I will go abroad on condition that my husband goes with me.
如果我丈夫能和我一起去,我就出国.

这两个句子都是对将来情况的取反,从句用should+动词原型,或者用were to do 其他形式不可以.

1.If only I had checked my answer before I handed in the paper.
2.His hesitation costed the chance of winning an gold medal in the Olympic Games.

B

考查虚拟语气。If only接had done，表示“但愿做过某事”“看看我目前的处境，但愿我听了你的建议就好了！”

B

一、only if
1.在only if 这个短语中,副词only是中心词,而从属连接词if则只是用来连接从句的,因此,它表示“只有……(才)；只有在……的时候,唯一的条件是……”的意思.例如：
I told him he would succeed only if he tried hard.我告诉他,只有努力才能成功.
2.only if 有时也写成only...if,表示唯一的条件,但是意思不变.例如：
I will only come home if you come with me.（= I will come home only if you come with me.） 只有你跟我一起走,我才回家.
因此,根据上面的分析,课文中的句子我们也可以把它改成Yet they could get the blood only if one of the frightened children would agree to give it.这样,句子就比较容易理解,意思也就十分清楚了：但是,只有这些受惊吓的孩子中有人自愿献血,他们才能够得到血.
二、if only
1.在if only这个短语中,中心词是从属连接词if,而副词only只是加强if的语气的,因此,if only仅仅是if的一种强化形式,不仅能表达说话人的愿望,而且能表达条件.因此,它同if一样,也能引出条件状语从句.
If only they were here now,we would be able to celebrate their wedding anniversary.如果他们现在在这里,我们就能庆祝他们的结婚纪念日了.
2.if only常常用来表达强烈的愿望或遗憾,因此,主要用在虚拟语气中,用以表达强烈的愿望或非真实条件.常被译为“但愿”、“要是……该多好啊”等.例如：
If only she could have lived a little longer.要是她能活得再长一些,那该多好啊!
3.if only从句在大多数情况下用作虚拟条件句,但是偶尔也有用在真实条件句的情况.例如：
He will succeed if only he does his best.只要他竭尽全力,他就会成功.
4.if only有时也可以写成if...only.例如：
If she would only come!但愿他能来.
三、从上面的分析,我们还可以看出only if和 if only这两个短语都可以用来引导条件从句,表示主句所需要的“条件”,但是两者有差异,主要表现在说话人的语义意图等方面.
1.only if 引起的条件状语从句,是一个对“条件”限制更严的“限制性条件状语从句”,表示“只有……(才) ；只有在……的时候；唯一的条件是……”的意思；与if引起的一般条件句相比,它有一种增强主句语势的作用.例如：
Only if the case is urgent should you call out the doctor in the middle of the night.只有患者情况紧急时,你才可以在半夜叫医生看病.
2.if only引导的条件句,通常用来表示说话人对某事所寄予的某种强烈愿望,相当于as long as.它可以独立使用,用来表示由于客观条件限制,为某事不大可能或完全不可能实现而感到惋惜或遗憾的复杂心情,常用虚拟语气.例如：
If only I were as clever as you!要是我像你一样聪明该多好啊!

1.If only必须用完成时
2.where可以不只可以表示现实中的位置,地方,也可以虚指（人物所处的）状态,状况,环境
3.had always been studying
现在完成进行时,从过去一直延续到现在而且很可能还要延续下去

由wish引起的表示愿望的虚拟语气
A．用wish表示对现在的愿望时,它所引起的宾语从句中谓语动词形式为：过去式（be动词用were）.
B．用wish表示对将来的愿望时,它所引起的宾语从句中谓语动词形式为：would,could,might+ 动词原形.
C．wish用于对过去的事实表示一种不可能实现的愿望时,宾语从句中的谓语动词形式为：had+动词过去分词或could,would + have +动词过去分词.
I wish that he weren’t so lazy.
I wish I hadn't wasted so much time.
I wish she would change her mind.
if only 的用法跟if条件句中条件从句的用法是一样的,你应该比较清楚吧,不清楚的话百度随便搜下就有很多解释.搜不到的话再补充问题我给你补充答案.

选C,if only,要是.就好了.后面用的是虚拟语气,句意：看我现处于麻烦的境地!要是我听了你的意见就好了.

if only 放句首是不用倒装,但要用虚拟语气
对现在事情的虚拟用 一般过去时态
对过去事情的虚拟用 过去完成时态
对将来事情的虚拟用 could/ would/ should/might +do
only if 不用虚拟语气
only 放句首时限制if 引导的条件状语从句,主句采用半倒装

起转折的作用,意思是：只要

C

考查虚拟语气。If only但愿，根据语境与过去事实相反，故用过去完成时，选C。

if only i B.could__play the guitar as well as you!A.would B.couldC.ShouldD.might
要是我也能和你一样会弹吉他就好了.
if only 要是.多好呀!表虚拟,要用虚拟语气,could 能够

一、基本用法介绍
1.as long as 有两个意思,一是用于本义,意为“与……一样长(久)”,在否定句中,也可说成 (not) so long as；二是用于引申义,表示“只要”,用于此义时也可说成 so long as(不管是肯定句、否定句还是疑问句).如：
This river is as long as that one.这条河与那条河一条长.
He lived abroad as long as five years.他住在国外长达五年之久.
As [So] long as you need me,I’ll stay.只要你需要我,我就留下.
2.only if 可视为 if 的加强说法,即其中的 only 是修饰 if 从句的,其意为“只有在……条件下”.如：
I’ll tell you,but only if you don’t tell anyone else.我可以告诉你,但条件是你不能告诉其他任何人.
二、语气上的差别
从语气上看,only if 的语气要比as long as 强,as long as 通常只是用于提出一个条件,与if 的意思比较接近；而only if 引出的从句内容则通常暗示它是主句内容的唯一条件,含有“只有……才……”“只有在……的时候”“……唯一的条件是……”之意.比较：
As long as you do your best,we’ll be happy.只要你尽力,我们就满意了.
We can succeed only if everyone in the team pulls his weight.我们全队只有人人各尽所能才能取得成功.
三、用法上的区别
在许多情况下,as long as 与 only if 均可用,只是语气有强弱之分.但是,当主句和从句的谓语动词均为短暂性动词时,通常只用 only if,而不用 as long as.如：
你只有请他,他才会来.
误：He will come as long as you ask him.
正：He will come only if you ask him.
析：此句中的 only if 不能用 as long as 代替,就是因为动词 ask 与 come 并不能延续很长的时间.
四、词序上的差别
两者均可引导从句置于主句之后,也可置于主句之前.但是,当only if 引导的状语从句置于主句之前时,其后的主句要用倒装语序,而且 as long as 引导的从句置于主句之前不用倒装.如：
As long as it doesn’t rain we can play.只要不下雨,我们就能玩.
Only if a teacher has given permission is a student allowed to enter this room.只有得到教师的允许,学生才可以进这间屋.
五、注意区别 only if 与 if only
only if 意为“只要”,可视为 if 的加强说法.而 if only 有两个意思,一是表示“只要”,此时通常与陈述语气连用,与 only if 用法相似；二是表示“但愿”“要是……就好了”,此时多与虚拟语气连用.如：
I will come only if you promise not to invite Mary.只要你答应不请玛丽,我就来.
If only it clears up,we’ll go.只要天晴,我们就去.
If only I hadn’t told him about it.要是我没有告诉他这事就好了.

He stare at me as if I have do the wrong ting. He eat very quickly as if he doesn't have meals a long time.（不知道这句有没有语法错误） If only I have one million,I will buy a car. If only I were you,...

个人建议A 是if only 的特殊用法 对过去的虚拟

My wife takes me to the office by car every morning.
If only the rain could stop.
Her sudden coming prevents him from going out.

If only I could fly!
But for the heavy rain, we would have arrived there on time.
Without your timely help, I wouldn't have passed the exam.
I didn't know your address, otherwise I would have sent the parcel to your house.
Supposing that you are wrong, what will you do then?
I would rather stay home today.
It looks as if it's going to rain.

只要她不再深夜弹钢琴,她就是一位理想的房客

if only 用于虚拟语气,表示“要是...就好了”
If only one had an unlimited supply of money!
要是财源不断就好了!（与现在事实相反）

要是我在神州5号飞船探索太空就好了.
if only 是“要是.就好了”的意思,用虚拟语气谓语用 had done.

If only I had had more money,I would have bought those new clothes. 与过去事实相反（过去完成时+would/should+have+过去分词）If only I had more money,I would buy those new clothes. 与现在事实相反 （过...

1.knew.用过去式表示虚拟,因为是if only（但愿,如果...就好）引起的从句
2.had not waste.wish表示愿望的时候,要用过去式表示虚拟.而从句是过去式,所以主句要用过去完成时.
3.had had.还是上述理由,要用过去式表示虚拟.那时间是yesterday（昨天）,那么昨天的过去就要用过去完成时.所以要用had done结构.而动词本身是have,所以had had.
4.did not have
5.这里可以用will have,因为表示是一种祝愿.