高考英语一轮复习——动词不定式主动表被动用法归纳

动词不定式主动表示被动

一、在某些固定句型中, 动词不定式作定语, 用主动形式表被动意义。

1）have（give, show）sth. to do

在这种句型中的不定式与前边的名词有动宾关系, 又和句中另一名词或代词构成主谓关系。例如: I have a lot of things to do this afternoon. to do与things是动宾关系, 与I是主谓关系。否则, 在表示被动意义时, 仍需要被动式。试比较: Have you anything to do this afternoon? 今天下午你有事要做吗?

（to do是由you发出的）

Have you anything to be taken to your parents? 你有要带给你父母的东西吗? （谁带不得而知）再如:

Please get me something to read. 请给我弄点读的材料。

He'll show you the right path to take. 他会给你指出要走的正确的路。

2）It（This, That）＋be＋a／an＋adj. ＋n. ＋to do

在这种句型中, 不定式与前面的名词有动宾关系。动词不定式可改为动词不定式复合结构。例如: This is a difficult question to answer. 这是个难答的问题。question与to answer为动宾关系。to answer可改为for me to answer。再如:

It is an easy sentence to translate. 这个句子很容易翻译。

3）There ＋be ＋n. ＋to do

在此句型中, 用来修饰主语的不定式, 可用主动式, 也可用被动式, 只是侧重点不同。用主动式作定语, 重点在人, 用被动式作定语, 重点在物。例如:

没有时间可以耽误。可译成:

There is no time to lose（to be lost）. 用to lose可看成for us to lose; 用to be lost, 谁lost time不明确。

但下述两句用主动不定式与被动不定式意义不同:

a. There is nothing to do now. （＝We have nothing to do now. ）现在没事干。

b. There is nothing to be done. （＝We can do nothing now. ）现在没办法了。

a. There is nothing to see. （nothing worth seeing）没有东西值得看。

b. There is nothing to be seen. （nothing there at all）看不见什么东西。

二、在某些“形容词＋不定式”的结构中, 不定式有被动意义, 与句子主语构成动宾关系。其句型有:

1）n. ＋be＋adj. ＋to do

The question was very difficult to answer. 这问题很难回答。

The job is very easy to do. 这工作很容易做。

2）n. ＋be＋too＋adj. ＋to do

The thing is too small to see. 这东西太小看不见。

I was too excited to say a word. 我激动得连一句话也说不出。

3）n. ＋be ＋adj. ＋enough to do

The box is light enough to carry. 这盒子轻得可带走。

The book is cheap enough to buy. 这本书很便宜可以买。

但下列两句可用不定式的主动式, 也可用被动式:

This plant is fit to eat ／to be eaten. 这种植物可以食用。

The cake is ready to eat ／to be eaten. 这块饼可以吃了。

三、某些动词, 如to let, to blame （责备）, to seek（寻找）用主动式表被动意义。

例如:

The house is to let. 这房子要出租。

Who is to blame for it? 这得怪谁?

The reason is not far to seek. 这理由不难找到。

练习: 选择填空。

1. The chair looks rather hard, but in fact it is very comfortable to __________.

a. sit

b. sit on

c. be sat

d. be sat on

2. I'm hungry. Get me something __________.

a. eat

b. to eat

c. to be eat

d. for eating

3. It is difficult for a foreigner __________ Chinese.

a. write

b. to write

c. to be written

d. written

4. I have no more letters __________, thank you.

a. to type

b. typing

c. to be typed

d. typed

5. The car is rather difficult __________.

a. to repair

b. to be repaired

c. repairing

d. being repaired

6. He was nowhere __________.

a. to see

b. to be seen

c. seeing

d. seen

7. She had no money __________ a birthday present for their children.

a. to buy

b. to be bought

c. bought

d. buying

8. We waited for the work __________.

a. done

b. being done

c. to do

d. to be done

答案:

1—5 bbbca 6—8 bad