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1、含情态动词的被动语态【考点链接】1. Some of the plastic bags can tafter June 1.Yes, people will use en vir onmen tal bags in stead.A. useB. be use C. be used D. are used2. There is a lot of wi nd in North Chi na.Well, more trees every year to stop the wind.A. must be planted B. can plantedC. should planted【结构】情态动词（s
2、hould/can/must/may/could等）+ be + 及物动词的过去分 词【句式】1. 否定句式：主语+情态动词+n ot be + 及物动词的过去分词。如：The word couldn t be used this way.2. 一般疑问句式：情态动词+主语+be+及物动词的过去分词。如：Should the letter be fini shed today?Yes, it should. /No, it shouldn t.【跟踪练习】根据要求完成句子。1. Teenagers should be allowed to play with friends at night.
3、改为否定句）Teenagers to play with friends at night.2. The flowers must be watered once a day.改为一般疑问句 ）the flowersonce a day?3. Should the classroom be cleaned on time?作肯定回答）J 4. Parents should allow children to choose their clothes.改为被动语态）Children to choose their clothes.5. The young tree can be planted
4、now.改为主动语态）We the young tree now.各种时态的被动语态八大时态的被动语态的构成：1. 一般现在时的被动语态构成：（am/is/are +done女口：I am asked to study hard.我被请求努力学习。This shirt is washed once a week.这件 T 恤一周洗一次。These songs are usually sung by boys这些歌曲通常是男生唱的。2. 般过去时的被动语态构成：（was/were don&女口：The soldier was killed, but the train was saved.这位战
5、士牺牲了，然而列车得救 了。Some no tes were passed up to the speaker 人给讲演者递上来一些纸条。3. 般将来时的被动语态构成：（shall/will be done）如：We shall be asked a lot of stra nge questio ns 我们将被问许多怪题。My son will be sent to school next September.来年九月我将送我儿子去读书。4. 过去将来时的被动语态构成：（should/would be do ne如：The n ews would be se nt to him as soo
6、n as it arrived消 肖息一到就会转给他的。He told us that the new railway would be built the next year.他告诉我新铁路将 在明年修建。5. 现在完成时的被动语态构成：（has/have been done如：The work has just bee n fini shed.工作冈H冈H结束。The old rules have bee n done away with by us 旧规章已经被我们废除了。6. 过去完成时的被动语态构成：（had been done女口：By last December three sh
7、ips had bee n built by the m到去年十二月底他们已建 造了三艘船。100 tractors had bee n produced by the end of last yea 在去年年底前生产了 100 辆拖拉机。7. 现在进行时的被动语态构成：（am/is/are being done女口：The bridge is being repaired.桥梁正在修复中。The new library is bei ng built by the workers.新的图书馆正在被工人们建设中。8. 过去进行时的被动语态构成：（was/were being done女口：A meet ing was being held whe n I was there.我在时，会议在开着。The college was being built at this time last year.去年这个时候这所大学正在建 设中。
