Unit 5 Section A(Grammar Focus-4c)语法专项突破2023-2024学年鲁教版(五四学制)九年级英语全册

Unit 5 You’re supposed to shake hands. Section A(Grammar Focus-4c) 语法专项突破 语法精讲 be supposed to 的用法 be supposed to do意为“应该做, 被期望做, 理应做”, 用来表示根据规定或传统习俗人们不得不做某事。时态、人称和句式的变化用be来体现, to为不定式符号, 后接动词原形。 1. —What are people supposed to do when they meet for the first time in the US? —_ A. They’re supposed to kiss each other. B. They’re supposed to bow. C. They’re supposed to shake hands. D. They’re supposed to hug. 【解析】选C。考查风俗习惯。根据常识可知, 美国人第一次见面应该是握手。 2. Jane _to call me last night, but she didn’t. A. supposed B. supposes C. was supposed D. is supposed 【解析】选C。考查固定搭配。由下文语境“但是她没有(打电话)”可知是“应该”, 应用be supposed to do sth. ; 其次根据句中的last night可知此处应用一般过去时的被动语态。 3. The students are supposed _their homework on time. A. finish B. to finish C. finished D. finishing 【解析】选B。考查固定短语。be supposed to do sth. 应该做某事。 4. You are supposed to talk with them every week. A. should B. can C. have to D. may 【解析】选A。考查固定短语。be supposed to意为“应该”, 与should意思相近。 中考体验 1. (2022 绥化中考)You are supposed to ask your teacher for help. 你应该向你的老师求助/你应该找你的老师帮忙。 2. (2022 成都中考)—You are not supposed to enter(enter) the teacher’s office unless you are allowed to. —Thanks, Mom. I got it. 3. (2022 青岛中考)To make rivers cleaner than before, everybody is supposed to protect(protect)them. 4. (2023 营口中考)青少年应该多与他们的父母沟通交流并被允许自己做决定。 Teenagers are supposed to/should communicate more with their parents and be allowed to make their own decisions. 考点二 1. It + be + adj. + to do sth.意为"做某事是……的",it为形式主语,真正的主语是后面的动词不定式(短语)。因动词不定式(短语)作主语较长,而谓语部分相对较短,用it代替后就避免了"头重脚轻"的现象。[来I think it’s very important to sleep for eight hours a night. 我认为每晚睡8个小时是很重要的。 2. 表示"对某人来说做某事是……的"用句型"It+ be + adj. + of sb. + to do sth."其中sb.为动词不定式to do sth. 的逻辑主语。二者的具体用法为: It + be + adj. + for sb. + to do sth. 此句型中的形容词为描述事物特征的词,如difficult,important, easy, hard, necessary, possible, dangerous, impossible等,是说明动词不定式的。 It + be + adj.+ of + sb. + to do sth. 此句型中的形容词为描述人物品质及性格特征的词,如clever,foolish,good,kind,nice,polite等,用来说明of后的sb.。 It’s hard for me to answer your question. 对我来说回答你