Unit 3 语法思维导图及专练--2022-2023学年度八年级英语下册基础知识专项讲练（人教版）

学科网 学科网原到，让学司更客易！ JP.ZXXK.COM 学科网精品频道全力推荐 Unit3 Could you please clean your room？(语法讲练) 【知识导图】 She couid speak two languages at the age of can的过去式 “过去的能力/可能姓 Icould go to America for summer hoiiday Could you piease open the door tor me? 提出请求 Could you plese not keep the door closed? could)用法 征求许可 C0Ud1的+其它？ Couldi go out to play with my friends 肯定回答 sure/ot course/certainty/O 否定回答 【要点拓展】 can和could的用法区别 一、表示能力 1表示现在的能力，用can。 Ican't decide which to choose.我不能决定选哪个好。 2表示过去的能力，一般用could。 Could you speak English then?你那时会说英语吗？ 二、表示许可。 l表示请求允许，两者均可用，但是could语气更委婉。 Could I come in?我可以进来吗？ 2表示给予允许，般只用can,不用could. Could I use your pen?Ycs,of course you can.我可以用你的钢笔吗？是的，你当然可以用。 【奇思巧计】 can的过去是could,用法不难请记清。 现在一般要用can,过去一股用could. coud表能力和可能，还表请求及征求。 板权，侵权必究！ 一般疑问could提前，回答方式真多变。 学科网 学科网原针，让学司更客易！ JP.ZXXK.COM 学科网精品频道全力推荐 【同步检测】 一、单项选择 1.-Could I smoke here? -,Look at the sign”No smoking!”' A.Yes,you may B.Of course you can C.No,you can't. D.No,you couldn't. 2.Could you please the door?It's too hot. A.open B.close C.to open D.to close 3.-Could you go to the bookshop with me?I want to buy The Grass House by Cao Wenxuan -Sorry,I .I've promised Mum to go home right after school. A.can't B.couldn't C.needn't D.mustn't 4.-Mom,could I surf the Internet after finishing my homework? You'd better go out for a walk A.Go ahead B.Sorry,you can't C.Of course you can 5.Could you please speak a little louder?I hear you very well A.can't B.mustn't C.should't D.needn't 6. -Could I use your bike? It's broken A.Sure B.Yes,please C.I am afraid not D.No,thanks 7.-Could you please do the dishes? I cut my finger and I'm trying not to get it wet. A.Yes,sure B.No problem C.Sorry,I'm afraid I can't D.That would be fine 8.-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 9.-My English is poor.Could you help me with it? A.Thank you B.Me,too C.No problem D.See you 10. I go out to play basketball now,Mom? -No.you can't