1、Unit 4Why 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
2、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
3、，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
4、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.AcouldBcouldntCshouldDshouldnt2_ I try on those shoes in the window?_.They are just on show.ACould；Yes，you can BCan；Sorry，you couldntCCould；Sorry，you
5、 cant DCan；Yes，you could3_ 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 Dand5Hey，man.You cant cross the street now.You have to
6、wait _ the traffic lights turn green.Oh，sorry and thank you.Awhen Bafter Cuntil Dwhile6Jimmy，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 eas
7、ily.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我们应该和老师友好相处。(get on.with)We should get on well with our teachers.,should stay,could,didnt,until,couldnt/cant,until,
