正： He must be written to.
小结：动词短语在转换成被动语态时，
介词或副词 不能丢掉其中的_____________。
三.Read the passage and answer right or wrong. 1.The tiger escaped from the zoo because it wan’t taken good care of.( R ) 2.One morning the tiger was seen to run into the city. (W ) 3.That morning the tiger was so strong that many animals were killed. ( W ) 4.Tom was asked to go to school that day. ( W) 5.The tiger was taken to the zoo by the zoo keepers. ( W ) 6.Now the tiger is given the most food in the zoo. ( R )
5ng trees. 误：Young trees must be taken good care.
正： Young trees must be taken good care of.
6.We must write to him.
误：He must be written.
（四）、动词短语的被动语态。
引入练习4、改正下列转换中的错误：
1.People often talk about the film. 误：The film is often talked. 正： The film is often talked about. 2.Lily looked after the baby. 误：The baby was looked by Lily. 正： The baby was looked after by Lily. 3.We shouldn’t give up the work. 误：The work shouldn’t be given . 正： The work shouldn’t be given up. 4.We can’t work out the problem. 误：The problem can’t be worked. 正： The problem can’t be worked out.
(二）一般现在时带情态动词的被动语态。 引入练习2。请将下列主动语态变成被动语态。 1.You can do the work all by yourself. can be done The work _____ _____ _____ all by yourself. 2.We must plant more trees. More trees _____ _____ planted must be ________. 3.We should dig a large hole. A large hole should ____ _____. _____ be dug 4.Can we put our bikes here? Can be put _____ our bikes ____ _____ here? 5.You mustn’t throw rubbish here. Rubbish ______ _____ ______ here. mustn’t be thrown 6.We can’t see many stars. can’t be seen Many stars ______ ______ _______ . 小结： 情态动词+be+过去分词 1.含情态动词的被动结构： ______________________. 情态动词 情态动词 2.疑问句提前_____________; 否定句：___________+not.
引入练习3、请将下列主动语态变成被动语态。 1.The farmer made the horses work the whole day. The horses______ made to were _____ ___ _____ the whole day. work 2.Mum asks the twins not to swim in the lake. are asked ___ to swim The twins ____ _______ not ___ _______ in the lake. 3.I saw a mouse run into the room. A mouse _____ _____ ____ ____ into the room. was seen to run 4.I often hear him sing English songs. is heard to sing He ____ often _____ ____ ____ English songs. 5.I saw Lucy playing in the park just now. Lucy ____ _____ _______ in the park just now. was seen playing 6.They watched the children sing that morning. were watched ___ _____ The children _____ ________ to sing that morning. 补上to 小结:1.主动语态中省略to的宾补在被动中应___________.如以 1、3、4、6 上 ___________题. 不变 2、5 2.其它形式的宾补在被动中______.如以上________题。
二、常见语态转换 （一）一般现在时和一般过去时的被动语态。 引入练习1。请将下列主动语态变成被动语态 1.Lucy bought some fruit. Some fruit _____ bought _____ Lucy. was ______ by 2.Uncle Wang waters the flowers every day. The flowers ___ _______ ____ Uncle Wang every day. are watered by 3.Did they build the bridge in 1998? ____ the bridge _____ in 1998? Was built 4.When did Lu Xun write these books? When _____these books _______ ____ Lu Xun? were written by 5.The farmers don’t grow apples on the farm. Apples aren’t grown on the farm. _____ _____ 6.They didn’t clean the classroom yesterday. The classroom _______ ________ yesterday. wasn’t cleaned 小结： be 形 过去分词 1、被动语态的转换，在be+过去分词中，确定_____ 是关键，_______永不变。 2、Be的时态由_______________确定；be的单/复数由____________确定。 主动时态 被动主语 3、问句提前__________; 否定________后加not. be be动词
四.Fill in the missing words according to the passage. (注意和原文语态的不同） Several days ago a large tiger escaped from the zoo because it (1)______fed well. wasn’t to One morning the tiger was seen (2)_____run into a small by forest near the city (3)____Some people.The people (4)_______ told the police about it at once. They said that the tiger was very strong , but the animals around it (5)_____not hit. The police warned people were not to go out during the night. Tom was made not（6）____ go to to were school that day. The police(7)____ asked to find out the tiger quickly and kill it. But the police said the tiger should (8)____protected and be well looked after if it was found out. In the evening a big net was put around the Forest by the police. Some sheep (9)_____tied to the trees were behind the net.When the sheep were heard (10)_____ bleat , the hungry to tiger ran out to catch them. At last the tiger was caught and it was (11)_______back to the zoo. taken Now the tiger (12)______ taken good care (13)______. It must is of (14)_____given the most food because it is the largest. be