Unit 4 Section A(Grammar Focus～4c)-【四清导航•河南专版】2022-2023学年八年级英语下册作业课件(人教版)

第三课时　Section A(Grammar Focus4c) ——单元语法精讲精练 英语 八年级下册 人教版 四清导航 Why don't you...？的用法 ►“Why don't you...？”意为“你为什么不……呢？”，通常用来提出建议，相当于“Why not...？”。why don't you和why not后都跟动词原形。对其作肯定回答时，常用“Good idea./Sounds great.”等；对其作否定回答时，可根据实际情况作答。 【拓展】用于提建议，类似的表达方式还有： What/How about doing sth.？做某事怎么样？ Let's do sth. 让我们一起做某事吧。 Shall we/I do sth.？我们/我来做……好吗？ had better do/not do sth. 最好做/不做某事 Would you please do sth.？请你做……好吗？ Would you like to do sth.？你想去做某事吗？ 2 Would you mind doing sth.？你介意做某事吗？ 连词although，so that，until的用法 ►although意为“尽管；虽然；即使”，相当于though，用来引导让步状语从句。句中用了although或though，就不可再用but。若要强调前后两部分的对比意义，可在主句前加yet或still。 Although he didn't know me, he helped me a lot.尽管他不认识我，但他给了我很大的帮助。 ►so that意为“目的是；为的是；以便”，引导目的状语从句，从句中通常含情态动词can，may，might等。 Speak a little more loudly so that we can hear you clearly.大点声说，以便我们能听清楚。 【拓展】so that 引导的目的状语从句可与in order that或in order to结构相互转换。so that也可引导结果状语从句。 ►until与延续性动词连用时，动词用肯定形式，表示“直到……为止”，指主句的动作一直持续到until后的动作发生为止；与短暂性动词连用时，动词须用否定形式，意为“直到……才……”，指主句的动作一直到until后的动作发生时才发生。 I'll wait until you finish your work.我会一直等到你完成工作。 The boy didn't go to bed until his parents came back.那个男孩直到父母回来才上床睡觉。 一、选用until，so that或although填空。 1．We must hurry up _______ we can catch the train. 2．__________ it is not easy to learn English well，I won't give up. 3．The little baby didn't stop crying _____ he saw his mother. 4．The teacher speaks very loudly _______ all the students can hear her. 5．I will wait _____ Miss Jones comes back from work. 语法精练 so that Although until so that until 5 二、写出下列句子的同义句，每空一词。 6．Why don't you call her back? _____ ____ call her back? 7．They felt so tired，but they still went on working. ________________ they felt so tired，they still went on working. 8．They arrived very early in order to buy their favorite books. They arrived very early ___ _____ they could buy their favorite books. 9．Dave went to bed after he finished his homework last night. Dave ______ go to bed _____ he finished his homework last night. Why not Although/Though so that didn'