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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：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.你应该自己完成家庭作业。(2)否定句结构：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 reading room.
2、这本书不能被拿出阅览室。(3)一般疑问句结构：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：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：(以should为例，见下图)语法精练.用括号中所给
3、单词的适当形式填空。1More trees should be_planted(plant) this year.2Must the work be_finished(finish) by 6：30 this afternoon?3Where can the lost boy be_found(find)?4Thanks to the Internet，different kinds of information can be_learned(learn) in a short time.5The box should not_be_put(not put) here.6The bad foo
4、d shouldnt be_eaten(eat)7The stars can not_be_seen(not see) in the daytime.8Can this kind of bike be_bought(buy) in that shop?9The fruit should be_kept(keep) well during winter.10She shouldnt be_allowed(allow) to go out alone.单项选择。(B)11.Children should _ to be honest.Aeducate Bbe educatedCpunish Dbe
5、 punished(D)12.I want to borrow the book，but I dont know how long it may _.For two weeks.Aborrow Bbe borrowedCkeep Dbe kept(C)13.Whats the meaning of the activity “Lets Save”？Paper shouldnt _ in everyday life.Awaste BwastedCbe wasted Dis wasted(B)14.When must the classroom _？Acleaned Bbe cleanedCcle
6、an Dcleans(C)15.The question _ be answered by anybody.Acan BmustCcant Dmustnt.根据汉语意思完成句子，每空一词。16这本词典你可以借两周。The dictionary can be kept by you for two weeks.17应该允许学生们有兼职工作吗？Should students be allowed to have parttime jobs?18我们现在必须打扫教室。The classroom must be cleaned by us now.19这些衣服必须手洗吗？Must these clothes be washed by hand?20在哪里举行会议将会在明天讨论。Where to have the meeting will be discussed tomorrow.第 2 页
