九年级英语全册Unit7Teenagersshouldbeallowedtochoosetheirownclothes语法透视含情态动词的被动语态素材新版人教新目标版2

unit 7 teenagers should be allowed to choose their own clothes语法观点:带有情态动词的被动语态1.包含情态动词的被动语态的基本结构是“情态动词be和动词的过去分词方法”。many trees should be planted on the mountain ins。要在树上种很多树。students should be allowed to go to school by bike。应该允许学生骑自行车上学。2.将包含情态动词的主动句改为被动句。换句话说，将“情态动词原型”改为“情态动词be过去分词形式”。这时要使用主语的动词监听者。we should clean the classroom every day。the classroom should be cleaned every day。3.转换句型(1)否定句：在情态动词后加not即可。these books can t be read for children .这些书孩子们不能读。(2)一般疑问句：直接指被动语态的陈述句的情态动词所提到的句子的第一个字母。should ann be allowed to wear her own clothes？应该允许安选择自己的衣服吗？(3)特殊疑问句：由包含疑问词中情态动词的被动语态的一般疑问句组成。When must my homework be handed in？我的作业什么时候交？4.包含情态动词的被动语态的一般疑问句的回答通常需要保留原句的情态动词，但must表示“必要”时，对其否定回答使用neednt。-should my home work be finished today？今天要完成作业吗？-yes，-Yes，it should。/No，it shouldnt n t .是的，必须在今天结束。/不，今天不能结束。-Must the room be cleaned right now？房间需要马上打扫吗？-是，it must。/no，it needn t .是的，需要立即清理。不，你不需要马上清理。解决前所未有的问题示例1 teenagers should to choose their own clothes .A.allowb . to allowc . be allowed d . allowed句法分析c .主语teenagers是动作allow的所有者，根据should确定是否使用情态动词的被动语态，即情态动词be过去分词。示例2 what should we do first if we want to develop our village？-A lot of new roads，I think。A.have to build b . must build c . have built d . must be built解析D. New roads是应用被动语态的动作build的所有者。包括Must在内的情态动词的被动语态是“must be情态动词”。示例3，this kind of food _ _ _ _ _ _ cool，clean and dry according to the instruction。A.should be carried b . must be put c . should be placed d . must be kept语法分析d .根据句子的意思，主语food是行动的继承者，使用被动语态，空格后面的cool是形容词，“keep某物形容词”是“创造”.状态”，所以选择d。范例4 smoking _ _ _ in public places，so dont smoke here。A.allows b . is allowed c . doesn t allowd . isn t allowed解析d .主语smoking作为行为allow的继承者排除a和c。so dont smoke here知道这里禁止吸烟。语法干练I .用括号内给定单词的适当形式填空。1.how many magazines _ _ _(can borrow)in your library every week？2.inmany counties，teenagers under 18 _ _ _ _ _(should not allow)to go into internet bars。3.some people think trees _ _ _(should plant)on tree planting day only。4.the flowers _ _ _(must water)every day。5.a dictionary _ _ _(can use)in the exam。二.同义词句子转换，每个空单词。1.students should clean their class room every day。their class room _ _ _ _ _ _ _ _ _ _ _ every day。2.Can you mend this radio？_ _ _ _ _ _ _ this radio _ _ _ _ _ _ _ _ _ _ _？3.we should not allow fifteen-year-olds to work at night。fifteen-year-olds _ _ _ _ _ _ _ _ _ _ to work at night。4.who should be asked to volunteer at your local school？who should _ _ _ _ _ _ _ to volunter at your local school？5.they grow tea in the southeast of China .tea _ _ _ _ _ _ _ in the southeast of China。三.请根据汉语提示完成以下句子。1.many tall buildings _ _ _ _ _ _(可查看)everywhere in our city。2.all the work _ _ _ _ _ _ _(应该)as soon as possible。3.3.waste-paper _ _ _ _ _ _(不要扔)here。4._ _ _ _ _ ric _ _ _(可以种植)in winter？5._ _ _ _ _ _ the letters _ _ _ _(必须打)this afternoon？参考答案I.1. can be borroved 2 .should nt be allowed 3 .should be planted 4。must be watered 5。can be usedIi.1. should be cleane