1、单元语法小专题(Grammar Focus)语法精讲含有情态动词的被动语态本单元的语法重点是:含有情态动词的被动语态。其结构为: 情态动词(should，must ， may，can，could 等) be 及物动词的过去分词。1.含有情态动词的被动语态的常见句式:(1)肯定句结构为: 主语情态动词be及物动词的过去分词(by 宾语).如:Your homework should be finished by yourself.你应该自己完成作业。(2)否定句结构为: 主语情态动词notbe及物动词的过去分词(by宾语). 如:The book cant be taken out of the
2、 reading room.这本书不能拿出阅览室。(3)一般疑问句结构为: 情态动词主语be及物动词的过去分词(by 宾语)?回答:Yes，主语情态动词./ No ，主语情态动词not.如:Should these young trees be watered every day？应该每天给这些小树浇水吗？Yes， they should./ No，they shouldnt.对，应该。/ 不，不应该。(4)特殊疑问句结构为: 疑问词一般疑问句？如:What should students be allowed to do？应该允许学生们做什么？2.含情态动词的主动语态变被动语态的变化步骤:(
3、以 should 为例，见下图)语法精练.用括号内所给单词的适当形式填空。1.Many more trees should _(plant) this year.2.Must the work _(finish) by 6:30 this afternoon?3.Where can the lost boy _(find)?4.Thanks to the Internet，different kinds of information can _(learn) in a short time.5.The water should _(not put) here.6.The bad food sh
4、ouldnt be _(eat).7.The stars can _(not see) in the daytime.8.Can this kind of bike _(buy) in that shop?9.The fruit should _(keep) well during winter.10.Should I _(allow) to make my own decisions?.按要求完成下列句子，每空一词。11.Nobody can answer the question.(改为同义句)The question _ _ answered by anybody.12.We shoul
5、d clean our teeth twice a day.(改为被动语态)Our teeth should _ _ twice a day.13.Can you take good care of the children？( 改为被动语态)_ the children _ _ good care of?14.The classroom must be cleaned after school.(对画线部分提问)_ _ the classroom _ _？15.We must wash our hands before meals.(改为被动语态)Our hands _ _ _ before
6、 meals.根据汉语意思完成句子，每空一词。16.更远的恒星有一天可能被参观。Farther planets _ _ _ one day.17.你不应该在动物园里喂动物。Animals _ _ _ by you in the zoo.18.不应该允许青少年吸烟。Teenagers _ _ _ _ _ _.19.我们被允许周六晚上去看电影。We _ _ _ go to the movies on Saturday evening.20.不应该让他那么做。He _ _ _ _ do like that.单元语法小专题(Grammar Focus).1.be planted 2.be finished 3.be found 4.be learned 5.not be put6eaten 7.not be seen 8.be bought 9.be kept 10.be allowed.11.cant be 12.be cleaned 13.Can；be taken 14.When must；be cleaned15must be washed.16.may be visited 17.shouldnt be fed 18.should not be allowed to smoke 19.are allowed to 20.shouldnt be allowed to
