Unit7Teenagers should be allowed to choose their own clothes. Unit7Teenagers should be allowed to choose their own clothes. Grammar & Writing Grammar & Writing 含情态动词的被动语态can, could ( 能；会 ), may; might ( 可以 ) must( 必须 ), should( 应该 ), will; would( 愿意 )have to( 必须；不得不 ), had better( 最好 )GrammarGrammar1. 含情态动词 should 的被动语态结构式： should + be+ 及物动词的过去分词。 (1) 肯定句结构为：主语 +should be+ 及物动词的过去分词 + (by+ 宾语 ) 。 eg: 你应该自己完成作业。 Your homework should be finished by yourself.含情态动词 should 的被动语态含情态动词 should 的被动语态 (2) 否定结构为：主语 + should + not+ be +及物动词的过去分词 + (by+ 宾语 ) 。 eg ：不应该允许青少年晚上外出。 Teenagers should not be allowed to go out at night. (3) 特殊疑问句结构为 : 疑问词 + 一般疑问 句？ eg ：应该允许学生们做什么？ What should students be allowed to do? (4) 一般疑问句结构为 :Should + 主语 + be+及物动词的过去分词 + (by+ 宾语 ) ？ 回答 :Yes ，主语 +should./No ，主语 + shouldn’t. eg: 这些小树应该每天浇水吗？ Should these young trees be watered every day? Yes, they should. /No, they shouldn’t. 对，应该。 / 不，不应该。 We should allow teenagers to watch TV on Sunday. Teenagers should be allowed to watch TV on Sunday( by us).People may catch fish in the river.Fish may be caught in the river (by people).1.I can finish the work. The work can be finished by me.一般问句： Can the work be finished by you?2.We should plant many more trees. Many more trees should be planted by us.一般问句： Should many more trees be planted by us?PracticePracticeTeenagers should be allowed to drive the car .3.Parents should allow teenagers to drive the car.一般问句： Should teenagers be allowed to drive the car ?Trees must be ...
