2012完成句子考点精练：情态动词和虚拟语气 - 家长易论坛

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）

---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）

——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.