Unit10 Section A Grammar Focus-4c课件-2023-2024学年 人教版英语九年级全一册

Unit 10 You're supposed to shake hands. 第三课时 Grammar Focus-4c 1 一、be supposed to do sth.的用法 be supposed to 中的to为不定式符号，后接动词原形。其否定结构为“be not supposed to”,意为“不被许可；不应当”。 You are not supposed to smoke in public. 你不应该在公共场合吸烟。 1.be supposed to的主语为“人”时，意为“被期望……；应该……”，可以用来表示劝告、建议、义务、责任等，相当于should/be expected to。 You are supposed to ask the teacher if you want to leave the classroom. 如果你要离开教室，你应该问问老师。 语法精练 2 2.be supposed to的主语为“物”时，意为“本应；本该”，用于表示“某事本应该发生而没有发生”。 The train was supposed to arrive half an hour ago. 火车本应该在半小时之前到达。 【拓展】 be supposed to 后接“have+过去分词”时，表示“本应该做而没有做”。 You are supposed to have handed in your homework. 你本应该上交你的家庭作业。 3 二、句型It is+adj.+to do sth. “It is+adj.+to do sth.”中的It是形式主语，真正的主语是后面的动词不定式。有时动词不定式前有for/of sb.，其中sb.为动词不定式的逻辑主语。 It is not easy to learn English well. 学好英语不容易。 4 1.“It is+adj.+for sb.+to do sth.”中的形容词为描述事物特征的词，如difficult、easy、hard、important、dangerous等。 It's important for us to eat plenty of fruit and vegetables. 对我们来说，吃大量的水果和蔬菜是重要的。 5 2.“It is+adj.+of sb.+to do sth.” 中的形容词是描述人物品质或性格特征的词，如kind、good、nice、right、wrong、clever、careless、 polite、foolish等。 It was foolish of him to go alone. 他一个人去真是太傻了。 6 语法精练 Ⅰ. 单项选择 1.（2023·山东滨州中考）—Can he get the first prize in the race? —He ________ so, but he has just hurt his leg. It's impossible now.( ) A.will expect to do B.is expected doing C.has expected doing D.was expected to do √ 同步精练 7 2.（2022·黑龙江绥化中考改编）—It is convenient ________ us ________ things online. —So it is.( ) A.for; to buy B.of; to buy C.for; buy D.of; buy 3.Jane ________ to call me last night, but she didn't. ( ) A.supposed B.supposes C.was supposed D.is supposed √ √ 8 3.—Helen, you ________ tell the teacher if you want to go out of the classroom. —Sorry, sir. ( ) A.are supposed to B.are surprised to C.are afraid to D.are used to √ 9 Ⅱ. 按要求完成句子 1.You are supposed to arrive there on time.（改为同义句） You _______ arrive there on time. should 2.We are supposed to help him out.（改为否定句） We _______ __________ ___ help him o