2.We often hear him play guitar．

He is often heard to play guitar

注意：see,watch,hear,notice,feel,make, listen to, look at等动词/短语后作宾语补语的不定式都不带to；但改成被动语态后必须带to。

We should take care of the old people .

The old people should be taken care of.

以下为提高部分

主动式表被动义

1.My uncle gave me a gift on my birthday．

I was given a gift on my birthday．

A gift was given to me on my birthday.

3.主动语态中的主语变为介词by的宾语。

Eg.Some people attacked the towers.

　　 S　　　　　　 V　　　　　 O

　 The towers were　 attacked by some people.

S　　　　　　　 V

1)　　　 A car knocked him down yesterday.

-He was knocked down by a car yesterday．

2)Two doctors and ten nurses make up the medical team．

The medical team is made up of by two…．

3)When I got there, they were cutting up a fallen tree．

A fallen tree was being cut up, when I got there.

4)We’ll put on the play next Sunday．

The play will be put on next Sunday．

5)Workers are building a new teaching building in our school．

A new teaching building is being built by workers in our school．

6)They had completed the railway by the end of last year．

The railway had been completed by the end of last year．

7)We should protect the earth．

The earth should be protected．

8)You need to paint the wall．

The wall needs to be painted．

几种特殊结构

2.把动词变成“be + 过去分词”;

1.把原来的宾语提到前面作被动语态的主语;

100. D　 考查时态。根据题意，等到你到家的时候，我将正在睡觉。

99. D　 考查词义辨析。allow允许，使得到，而permit强调“正式认”“批准”。

98. D　 本题主要考查反意疑问句部分的逻辑一致性。句子的主语是inspectors，代词用they代替；谓语动词的时态为带will的将来时，疑问部分应用won't形式，于是本题选D。

97. B　 本题主要考查固定搭配的识记及动词的语态。根据help的搭配要求，介词须用with，从而排除选项A. C；动词prove表示事物的性质时，为不及物动词，不用被动形式，于是本题的正确答案为B。

96. A　 本题主要考查动词短语的意义辨析。选项A的意思是“出现，进展，一起来”；选项B的意思是“呈现，雇佣，接纳，承担”；选项C的意思是“经过”；选项D的意思是“落后”。根据对话的内容，前者表现出对没有得到工作的悲观情绪，后者表示对他的安慰，指更好的事情会出现，于是本题的正确答案为A。