2019学年度人教版选修七Unit3Under the seaPeriod5不定式和动词-ing形式的被动语态学案设计

请看两道试题：

1. Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.

A. to see B. to be seen C. seeing D. seen

分析：remain 后接to do sth.作表语， see 与主语从句是动宾关系，所以要用to be seen，故答案为B。

2. The discovery of new evidence led to ______.

A. the thief having caught B. catch the thief

C. the thief being caught D. the thief to be caught

分析：lead to 中的to 是介词，后接动词-ing形式作宾语。"小偷被抓"应用动词-ing的被动形式being caught，所以选C。

不定式和动词-ing形式的被动语态是历年高考考查的重点和难点。下面就这两点做一简要介绍。

一、不定式的被动语态

1. 当不定式的逻辑主语是动作的承受者时，这个不定式要用被动语态。如：

The meeting to be held tomorrow afternoon is of great importance.

明天下午要开的会议非常重要。

再如两道选择题：

(1) Little Tom would love ______ to the theater this evening.

A. to be taken B. to take

C. being taken D. taking

分析：本题考查不定式在固定结构中的谓语形式。would love后一般只用动词不定式作宾语。句中主语little Tom是take的逻辑宾语，用被动形式，所以选A。

(2) To go shopping on Sundays seems to my mother a rule ______.

A. to never break B. never to be breaking

C. never to be broken D. never to have broken

分析：动词不定式和前面的a rule有逻辑上的动宾关系，所以要用它的被动语