2012完成句子考点精练：情态动词和虚拟语气

云霞客

1.区别不同的情态动词的意思特别是will、would“会”、must“一定”can’t、couldn’t “不可能”should“竟然、按道理来说应该如此”

Mike ______________________(肯定不在打扫)the classroom now. I saw himplaying basketball on the playground a moment ago.（clean）

I can’t imagine _______________________(竟然短缺)of water in Yunlan ，the southwest of China wherethere used to be adequate rain.(shortage)

This kind of kite made of silk _____________ (不容易撕破), so don’t worry about it.(tear)

2.对过去的动作进行推测用情态动词+have done 的形式; 对过去正在进行的动作进行推测用情态动词+have been doing的形式；对现在正在进行的动作推测用情态动词+be doing的形式。

3.含must 的反意疑问句，当must表示推测时不能用must引导反意疑问句。对现在的动作进行推测则用表示现在时的助动词来引导；当句中有must have done 的形式且后面又有表示过去的时间状语，此时用表示过去时的助动词来引导；当句中有must have done 的形式且后面没有表示过去的时间状语，此时用have、has 来引导。

You must have watched thatfootball match last night,________________？(不是吗)（you）

He can speak Spanish very fluently .He must havelearned the language before,____________(不是吗)？（he）

4.名词性从句中含有“坚持、命令、建议、要求”时insist、order、command、advise、propose 、demand、desire、request、require、urge、recommend以及这些词的名词形式，用should也可省表示虚拟语气。

Representatives attending Copenhagen Conference recommendedthat _______________________ (采取严厉措施)to reduce carbon emission.(take)

5.If引导的从句中含有should、had、were可以省略if将should、had、were提到句首

It’s a pity that he failed the exam. If he____________________(更加注意)his handwriting，he wouldhave done better.(concentrate)

If ____________(不采取有效措施)，we wouldhave lost all our tropical forests by 2100.(take)

6.would rather+从句用虚拟语气 当表示于现在或者将来事实相反时用过去时 若表示与过去事实相反的则用过去完成时

Do you feel like dining out for a change or would yourather we two __________(吃晚饭)at home？（have）

7.含蓄条件句 without, with, but for, otherwise等。

---Why didn’t you tell him the possible danger ？

---But__________________________(我能做什么)otherwise？He never listens to me.(do)

Last Friday’s charity pop concert was a great successas a whole .Actually we _________________________ (会满意)with half of the moneycollected.(satisfied)

It was vital to choose exactly the right place to cutor the diamond________(本来可能成为碎片)（break into）

8.主从句时态不一致

——The weather has been very hot and dry.

——Yes. If it had rained even a drop ，things ______________________ (就会更好)now！My vegetables wouldn’t havedied.(be)

答案：can’t be cleaning； thereshould be a shortage；won’t tear easily；didn’t you； hasn’the； strict measures should be taken； hadconcentrated more on； no effective measures were taken； haddinner； what could I have done； would have been satisfied； couldhave broken into pieces; would be better.