Unit 3 Could you please clean your room 单元语法清-【四清导航•辽宁专版】2022-2023学年八年级英语下册作业课件(人教版)

英语 八年级下册 人教版 四清导航 单元语法清 语法精讲 情态动词could 情态动词could可用于礼貌地提出请求或征求对方的许可。 用法 1．表示礼貌地请求别人做某事。句型：Could you (please) do sth.？肯定回答：Yes, sure./Of course, I can./No problem./With pleasure.否定回答：Sorry, I can't./Sorry, I have to.../I'm afraid I can't.如： —Could you please sweep the floor？请你扫一下地好吗？ —Sorry, I can't.I have to do my homework.抱歉，我不能。我需要做作业。 2．表示礼貌地请求别人允许自己做某事。句型：Could I do sth.？肯定回答：Yes, you can./Of course, you can./Yes, please.否定回答：Sorry, you can't./I'm afraid you can't.如： —Could I use your bike？我可以用你的自行车吗？ —Yes, you can.是的，你可以。 【拓展】could的其他用法： (1)could为can的过去式，表示能力。如： She could swim at the age of seven.她7岁时就会游泳。 (2)could表示可能性，指对将来、现在或过去某种可能的推测。如： The book could be Mike's.He likes reading science books.这本书可能是迈克的，他喜欢看科学书籍。 (3)could表示建议某人做某事。如： You could get your sister a scarf as her birthday present.你可以给你妹妹买条围巾作为她的生日礼物。 语法精练 一、单项选择。 (　 )1.—Mom，________ I swim in the lake? —No，you ________． A．should；can't B．need；mustn't C．must；needn't D．could；mustn't (　 )2.It's said that Einstein ________ read until he was four. A．can't B．mustn't C．couldn't D．needn't (　 )3.David，________ you please sweep the floor and take out the rubbish? A．could B．should C．might D．must D C A (　 )4.—Could you please ________ the noise? Your sister is sleeping. —Sorry, I won't. A．not make　 B．not to make C．make　 D．made (　 )5.—Helen, could you please water the flowers in my garden? —________.They are so lovely. A．That's too bad B．With pleasure C．You're welcome D．I'm afraid not A B 二、句子翻译。 根据所给中文完成句子翻译。 6．请你不要在教室里大喊好吗？ not shout in the classroom? 7．你五岁的时候会做什么？ when you were five? 8．我今晚可以玩电脑游戏吗？ computer games tonight? 9．能请你帮我把门打开吗？ Could you please help me (to) open the door? 10．明天上午我们可以去爬山吗？ Could we go to climb the mountain tomorrow morning? Could you please What could you do Could I play $$