八年级英语下册unit2i'llhelptocleanupthecityparks第3课时(grammarfocus_4c)同步语法精讲精练课件新版人教新目标版

Unit 4 Why dont you talk to your parents? 第三课时 (Grammar Focus4c) 单元同步语法精讲精练 浙江地区 情态动词should，could的用法 “should动词原形”表示“应该/应当做某事”。 “could动词原形”表示“可以做某事”。 should和could都可用来提出建议，表示轻微的批评或遗憾，但could语 气更委婉、客气。should意为“应当/应该 ”；could意为“可以/可能” 。 eg：You shouldnt argue with your parents! 你不应该和你父母争吵！ You could be more careful.你可以更仔细些。 当征求别人意见时 ，常用should。 eg：What should I do？我该做什么？ 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.他虽然 有很多钱，但并不幸福。 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，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 didnt come.我一直等到3点，但他没来。 (wait为延续性动词 ) The noise of the street didnt 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、单项选择。 1Last year I _ drive.I used to take the bus. Acould Bcouldnt Cshould Dshouldnt 2_ I try on those shoes in the window? _.They are just on show. ACould；Yes，you can BCan；Sorry，you couldnt CCould；Sorry，you cant DCan；Yes，you could 3_ our teacher is ill, _ he still comes to our class to teach us. AThough；but BThough；/ CAlthough；but D/；though B C B 4Would you like some milk? No，thanks.I dont like it, _ I know its good for my health. Abecause Bthough Cif Dand 5Hey，man.You cant cross the street now.You have to wait _ the traffic lights turn green. Oh，sorry and thank you. Awhen Bafter Cuntil Dwhile 6Jimmy，its time to go to bed. Oh，I wont do that _ I finish my homework. Aif Buntil Cafter Dwhen B C B 7Susan，what are the advantages (好处) of MP5 players? Mom，they are smaller and lighter _ they can be carried very easily. Aunless Bif Cuntil Dso that D 二、根据汉语意思完成下列句子。 8你感冒了，你应该 待在家里。 You have a cold.You _ at home. 9今年夏天我们可以去海南。 We _ go to Hainan this summer. 10昨天早上李明八点才起床。 Li Ming _ get up _ eight oclock yesterday morning. 11这些疲倦的孩子直到晚上9点钟才能回家。 The tired children _ get home _9：00 pm. 12我们