专题7.3 Grammar-学易试题君之K三关2017-2018学年九年级英语人教版.doc

含有情态动词的被动语态 构成 含有情态动词的被动语态的结构为＂+助动词be+及物动词的过去分词＂can, may, must, should等。 ?The flowers should be watered.应该给花浇水了。 ?Tables can be made of stone.桌子可由石头做成。 ?Teenagers should be allowed to go out with their friends.青少年应该被允许和朋友外出。 句式 （1）肯定形式：主语+情态动词+be+及物动词的过去分词+by短语（by短语可省略）。 （2）否定形式：主语+情态动词+not +be+及物动词的过去分词。 （3）一般疑问句：情态动词+主语+be+及物动词的过去分词？ （4）特殊疑问句：特殊疑问词+情态动词+主语+be+及物动词的过去分词？ ?Waste paper should not be thrown here. 废纸不应该被扔在这里。 ?Must the trees be watered now? 这些树必须现在浇水吗？ ?Should it be done by Li Ming? 这件事应该是李明干吗？ 【警示】如果不强调动作的执行者，by短语常可省略。[来源:学#科#网] 三、含有情态动词的主动句与被动句之间的转换 含有情态动词的主动句变为被动句时，要把主动句中的宾语变成被动句中的主语；主动句中的谓语变为＂情态动词+be+及物动词的过去分词＂；主动句中的主语变为介词by的宾语（如果不强调动作的执行者，by短语常可省略）。 主动句：She must clean her room every day. 主语 谓语 宾语 被动句：Her room must be cleaned (by her) every day. 【典例】1. Teenagers should _______ to choose their own clothes. A. be allowed B. allow C. allowed D. to allow 【答案】A 2. More trees must _______ here. A. be planted B.planted C. To plant D. plant 【答案】A 【解析】句意：在这儿更多的树需要被种。此题考查含有情态动词的被动语态，根据句意可知选A。 四、含有情态动词的被动语态的句子结构 句式 结构 例句 肯定句 主语＋情态动词＋be done(＋by＋宾语). The work should be finished by ten.这项工作应该在十点之前完成。 否定句 主语＋情态动词＋not＋be done (＋by＋宾语). Those books mustnt be taken out of the library.不准把那些书带出图书馆。 一般疑[来源:Zxxk.Com] 问句 情态动词＋主语＋be done(＋by＋宾语)？ May these rooms be cleaned tomorrow？这些房间可以明天打扫吗？ 特殊疑 问句 特殊疑问词＋情态动词＋主语＋be done(＋by＋宾语)？ When should these books be sent to the children in mountain areas？这些书应该什么时候送给山区的孩子们？ 【典例】Hurry up! The exam must ________ in 100 minutes. A. finish　 B. be finished　 C. is finished 【答案】B 一、将下列句子改为被动语态。 . We must speak to the old people politely. Must the old people _______ _______ to politely? 2. Dad cleaned the car yesterday. The car ______ _________ by Dad yesterday. 3. We often water these young trees These young trees ______ often _______ by us. 4. The boy broke the window yesterday. The window ________ ________ by the boy yesterday. 5. I will give him a camera