Unit 2 Section A (Grammar Focus-4c)语法知识点讲解与练习 2023-2024学年鲁教版(五四学制)九年级英语全册

Unit 2 Teenagers should be allowed to choose their own clothes. Section A (Grammar Focus-4c) 专项语法突破 【语法精讲】 含有情态动词的被动语态 一、含有情态动词的被动语态的构成 情态动词(should, can, may, could等)+be+及物动词的过去分词。 二、含有情态动词的被动语态的基本句式 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). 2. 否定句结构: 主语+情态动词+not+be+及物动词的过去分词(+by+宾语). The book can’t be taken out of the reading room. 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)? 肯定回答: Yes, 主语+情态动词. 否定回答: No, 主语+情态动词+not. —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 shouldn’t. ——是的, 应该。/不, 不应该。 4. 特殊疑问句结构: 疑问词+一般疑问句? What should students be allowed to do? 应该允许学生们做什么? 【拓展】含有情态动词的主动句转换为被动句 (1)主动句中的宾语变为被动句中的主语。 (2)主动句中的谓语变为“情态动词+be+及物动词的过去分词”。 (3)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)。 【语法集训】 Ⅰ. 用所给词的适当形式填空 1. Calculators(计算器) mustn’t be used(use) in the exam.   2. The girl shouldn’t be allowed (allow) to go out alone at night.   3. Hurry up! The exam must be finished (finish) in 90 minutes.   4. The boy thinks he shouldn’t be told (tell) what to do because he is 18 now.   5. To make our city more beautiful, more trees and flowers should be planted (plant) every year.   二、将下列句子改为被动语态 1. Parents should encourage teenagers to make their own decisions. Teenagers should _________ _________to make their own decisions by parents .   2. We should do something to cut down the air pollution. Something should _________ _________to cut down the air pollution by us.   3. Grandma advised cooking the soup for more than two hours. The soup should _________ _________for more than two hours according to Grandma’s advice.   4. You should make the bed every day. The bed _________ __________ _________ by you every day .   5. We must keep air fresh all the time. Air _________ ___________ ________fresh by us all the time .   答案: 1. be encouraged　2. be done　3. be cooked 4. should be made　5. must be kept 【中考体验】 Ⅱ. 单项选择 1. (2023·昆明中考) A lot of teenagers think as they are older and wiser, they ______to make their own de