Unit 4 第三课时 (Grammar Focus 4c)—单元同步语法精讲精练-【原创新课堂•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　(Grammar Focus­4c) —单元同步语法精讲精练 英语 八年级下册 人教版 原创新课堂 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。 eg：—Why don't you join the sports club？你为什么不加入运动俱乐部呢？ —Good idea.好主意。 —Why don't you buy this bike？你为什么不买这辆自行车？ —Well，it is too expensive.哦，它太贵了。 2 连词although，so that，until的用法 ►although意为“尽管；虽然”，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。 eg：Although/Though he has a lot of money，yet/still he is unhappy.虽然他有很多钱，但是他并不幸福。 ►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，could，may，might等。 eg：He got up very early so that he could catch the early bus.他起床很早，为的是能赶上早班公共汽车。 【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。 ►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。 eg：I waited until 3：00，but he didn't come.我一直等到3点，但他没来。(wait为延续性动词) The noise of the street didn't stop until midnight.街上的喧闹声一直到半夜才停止。(stop为短暂性动词) 一、根据句意，选用until，so that或although填空。 1．You could take lots of exercise ______ you can keep healthy. 2．I will wait _____ Miss Jones comes back from work. 3．_________ it is not easy to learn English well，I won't give up. 4．The little baby didn't stop crying ______ he saw his mother. 语法精练 so that until Although until 5 二、按要求完成下列句子。每空一词。 5．Why don't you call her back？(改为同义句) _____ ____ call her back? __________ _____ calling her back? 6．They felt so tired，but they still went on working.(改为同义句) ________________ they felt so tired，they still went on working. 7．They arrived very early in order to see their favorite stars.(改为同义句) They arrived very early ___ ____ they could see their favorite stars. 8．Dave went to bed after he finished his homework last night.(改为同义句) Dave ______ go to bed _____ he finished his homework last night. Why not What/How about Although/Though so that didn't until 一、根据句意，选择方框中的单词或词组并用其适当形式填空。 1．He often borrows my dict