被动语态课件

1、被动语态专项复习1.当我们不知道谁是动作的执行者，2.只需强调动作的承受者。二、被动语态结构：主 +be + 过去分词(PP) + (by )1.把原来的宾语提到前面作被动语态的主语;2.把动词变成“be + 过去分词”;3.主动语态中的主语变为介词by的宾语。被动语态基本用法一、以下情况要用被动语态三、在改写中应注意：His brother washes bowls every day主谓宾(受动者)Bowls are washedbyhis brother every day.改为被动语态1.They make shoes in that factory.主语+及物动词+宾语Shoes a

2、re made (by them) in that factory.一般现在时：变为被动语态S(主语）+am/is /are +过去分词They play football on Sunday.Lucy does the homework in the evening.They often use computers in class.We make these machines in Beijing.Football is played by them on Sunday.The homework is done by Lucy in the evening.Computers are of

3、ten used by them in class.These machines are made in Beijing.He looked after the little baby yesterday.主谓宾(受动者)The little baby was looked afterbyhim yesterday .2. They bought ten computers last term Ten computers were bought (by them) last term.一般过去时：S+was/were +过去分词They built the tall building last

4、 year.He took good care of his little brother yesterday.We cleaned our classroom just now.They used this room for resting.The tall building was built by them last year.His little brother was taken good care of by him yesterday.Our classroom was cleaned by us just now.This room was used for resting b

5、y them.Tom will clean the room tomorrow.主谓宾(受动者)The roomwill be cleanedbyTom tomorrow.3.They will finish the work in ten days.The work will be finished (by them)in ten days.一般将来时：S+ will+be+过去分词We will have a sports meeting next week.Children will take some photos in the schoolyard tomorrow.The head

6、master will give a talk this afternoon.A sports meeting will be had by us next week.Some photos will be taken by children in the schoolyard tomorrow.A talk will be given by the headmaster this afternoon.4Amy can take good care of Gina Gina can be taken good care of by Amy.情态动词：S+ can/may/must/should

7、 + be+过去分词1.He can take care of the baby.2.Lucy may draw the pictures.3.You must turn off the lights.4.They should learn English well. The baby can be taken care of by him.The picturesmay be drawn by Lucy.The lights must be turned off by you.English should be learned well by them.Exercises：1.Many pe

8、ople speak English.2.People used knives for cutting things.3.We can use the box as a table.4.We should clean the classroom every day.5.She will repair the bike tomorrow. English is spoken by many people.Knives were used for cutting things by people.The box can be used as a table by us.The classroom

9、should be cleaned by us every day.The bike will be repaired by her tomorrow.下列时态的被动语态构成 1.Lucy is watering the trees. 2.We have finished our compositions. 看一看 想一想The trees are being watered by Lucy.Our compositions have been finished by us.Some workers are painting the rooms nowThe rooms are being p

10、ainted by some workers now.现在进行时： S+ am/is/are + being +过去分词We have made twenty more keysTwenty more keys have been made by us.现在完成时： S+ have/has + been+过去分词一般现在时：一般过去时：一般将来时：含情态动词现在完成时： S+ am/is /are + doneS+can/may/must/should+be+done S+ will + be + done S+ have/has + been+ doneS+ was/were + done各

11、种时态的被动语态构成一些特殊动词的被动用法1. see, watch, make, let, hear, notice等用于主动时，后接动词原形；用于被动时，后接动词不定式。2. feel, taste, sound, smell, look 感官动词后接形容词；wear, sell, write等后接副词表明主语特性，它们用主动形式表达被动含义。3. sth+need+doing =sth+ need +to be done中考挑战1.Its difficult for the village children to cross the river for school.I think a

12、bridge _over the river.(2009年安徽省中考题)A.was built B.is being built C.has been built D.should be built 2.The task_in an hour. Then we can go home and have a good rest. (2012年安徽省中考题) A.was finished B.will be finished C.has been finished D.cant be finished 3. Dont worry. Your package _here until you come

13、 back, so enjoy shopping here.(2011年安徽省中考题)A. will keep B. has kept C. will be kept D. has been kept 4. - Are you going to the party? - No, because I _.(2010年安徽省中考题) A. have asked B. havent asked C. have been asked D. havent been asked5.Thanks to the Internet, different kinds of information _ in a s

14、hort time.(2013年安徽省中考题)A. can be learned B. has been learned C. can learn D. has learned.DBCDA6. Another man-made satellite was sent up into space by them last week (济南市中考题） another man-made satellite into space last week.变主动语态7.People there planted many trees last year. Trees _ _ by people there la

15、st year. (青岛市中考题）8. They grow vegetables on the farm. The vegetables _ _on the farm（上海市中考题）TThey sent upwere planted are grown1.He cleans the classroom every day.2.They finished their homework.3.I can mend his bike.4.She will buy ten books tomorrow.5.We shouldnt allow them to go out with their friends.6.The old man often makes us laugh.The classroom is c