被动语态演示

1、被动语态被动语态一、被动语态的含义一、被动语态的含义:主语是动作的承受者主语是动作的承受者例例: The car was mended yesterday.(Car 不是自己不是自己修的修的,而是被人修理的而是被人修理的,即即car 是动作是动作mend的承受的承受者者.)二、被动语态的构成二、被动语态的构成:一般现在时：一般现在时：一般过去时：一般过去时：is/ am / are + 动词的动词的过去分词过去分词were/ was + 动词的动词的过去分词过去分词含情态动词的：含情态动词的：(can, must, may, will, should)(can, must, may, will

2、, should)+be +动词的动词的过去分词过去分词三、主动语态与被动语态的转换：三、主动语态与被动语态的转换：被动句：被动句：主动句：主动句：(一般现在时一般现在时)They take many photos for their child every year.many photos are taken by them for their child every year.主动句主动句：（一般过去时）：（一般过去时）Tom picked a lot of apples on the farm yesterday被动句：被动句：A lot of apples were pickedby

3、Tomon the farm yesterday主动句主动句（含情态动词（含情态动词can, may, must, should,will的）的）Trees can stop the wind from blowing the earth away.被动句：被动句：The windcan be stopped from blowing the earth awayTrees can stop the wind from blowing the earth away.by trees.练习练习:一、改写下列句子一、改写下列句子1 We must look after the desks and

4、chairs well.2 Mother wakes me up every morning.3 They washed the clothes by themselves.4 We must finish the report before tomorrow.5 We should look after the old people well.6 Our teacher asked me to the office just now.二、选择填空。二、选择填空。1 If all the exercises _, you can have a rest.A are done B have fi

5、nished C finished2 The little boy _ at the corner of the road yesterday.A found B was founded C was found3 Those flowers must _ twice a day.A be watering B water C be watered4 None of those key can _ the door.A open B be open C be opened5 His bad tooth _ out last Wednesday.A pulled B had pulled C wa

6、s pulled 6 Last weekend my friend told me that he _ to America to study.A sent B was sent C had sent7 Hurry up! This old man must _ to the hospital at once.A take B be taken C be taking8 Everyone should _ each other politely.A talk to B be talked to C be talking about9 No one _ to take the magazines

7、 out of the library.A is allowed B is allowing C allows10 I need a paper to _on.A be written B write C be writing三、完成句子三、完成句子1白天可以看见星星吗？白天可以看见星星吗？_ stars _ in the day-time.2 这些坑必须要挖得够深。这些坑必须要挖得够深。 These holes _ deep enough.3 我们的作业必须独立完成。我们的作业必须独立完成。 Our homework _ by ourselves.4 他放弃了上大学的机会。他放弃了上大学的机会。He _ the chance to go to the college. 5 他小时候经常被人