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【题目】完成句子 (不限词数)。

【1】There was a heavy curtain _____________ the light (遮住,挡住).

【2】无论广告多么好,如果产品不合适,人们也不可能被说服去买的。

_______________ an advertisement is, people are unlikely to be persuaded if the product is unsuitable.

【3】 长时间接触广告能改变人们的看法。

On the other hand, ________________advertisements can help to change our opinions over time. (用expose表达)

【4】看你浑身湿透了。你一定赶上大雨了吧!

You are wet all over. You ________________ (be) caught in the rain.

【5】 我们决不能向他们的不合理要求让步.

We must not________________ their unreasonable demands.

【答案】

【1】blocking out

【2】However good/No matter how good

【3】being exposed to

【4】must have been

【5】give way to/give in to

【解析】

试题分析:根据所给汉语完成下面的句子。

【1】blocking out 此处是现在分词作后置定语,故填blocking out。

【2】However good/No matter how good 此处考查让步状语从句,根据句意可知填However good/No matter how good。

【3】being exposed to 动名词一般式的被动式做主语,故填being exposed to。

【4】must have been must have done表示“一定是做某事了”,表示对过去事情有把握的肯定的推测,故填must have been。

【5】give way to/give in to 情态动词后面用动词原形,根据句意可知填give way to/give in to。

【知识拓展】

情态动词+have+done用法总结

1. “must+have+done”表示对过去事情的肯定推测,译成“一定做过某事”,该结构只用于肯定句。

It must have rained last night, for the ground is wet. 昨晚一定下雨了,因为地面还是湿的。

2. “can't+have+done”表示对过去事情的否定推测,译成“不可能做过某事”。

Mary can't have stolen your money. She has gone home. 玛丽不可能偷你的钱,她回家去了。

3. “can+have+done”表示对过去行为的怀疑,用于疑问句,译成“可能做过……吗?”。

There is no light in the room. Can they have gone out? 屋里没有灯,他们可能出去了吗?

4. “could+have+done”是虚拟语气,表示对过去事情的假设,意思是本来能够做某事而没有做。

He could have passed the exam, but he was too careless. 本来他能够通过考试,但是他太粗心。

5. “may+have+done”表示对发生过的事情的推测,意思是“可能已经”或“也许已经”,用于肯定句中。

—What has happened to George? —I don't know. He may have got lost.—乔治发生了什么事? ——我不知道,他可能迷路了。

6. “might+have+done”表示对过去事情的推测,might与may意思相同,但可能性更小。多用于虚拟语气结构中。

He might have given you more help, even though he was busy. (MET90) 他或许会多给你一些帮助,即使他很忙。

7. “would+have+done”虚拟语气,表示对过去事情的假设,意思是“本来会做”。

Without your help, I wouldn't have achieved so much. 没有你的帮助,我是不会取得如此大的成绩。

8. “should+have+done”意思是“本来应该做某事,而实际没做。” “shouldn't+have+done”表示本来不应该做某事,而实际做了。含有指责对方或自责的含意。 Look, Tom is crying. I shouldn't have been so harsh on him. 看,汤姆哭了,我本来不应该对他如此严厉。

9.“ought to+have+done”表示过去应该做而实际并没有做,译成“理应做……”,往往表示遗憾。与“should+have+done”用法基本一样。I ought to have gone home last Sunday. 我理应上星期日回家。

10. “need+have+done”表示本来需要做某事而没有做。“needn't+have+done”则表示“本来不需要做某事而做了”。

I needn't have bought so much wine—only five people came. 我本来没有必要买这么多酒,只来了五个人。

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