—Could you swim at the age of 5 ? ——No,I____（选项略）这是英语周报上的一道题,它的答案是 couldn’t .但我曾经在另一本教辅上看过这样一个语法点：在问句中,could比can语气更委婉,但无论在肯还

Could you swim when you were ten?No,I can't./Yes,I can./Yes,I could.哪个对为什么 —Could you swim at the age of 5 ? ——No,I____（选项略）这是英语周报上的一道题,它的答案是 couldn’t .但我曾经在另一本教辅上看过这样一个语法点：在问句中,could比can语气更委婉,但无论在肯还 could you swim at the age of six?i said to Jim,改为宾语从句i asked Jim ( ) he ( ) swim at the age of six 还比较简单的,看看1,__we swim in that river?No,you __.It's dangerous to swim here.A ,Must,can't B,Can ,may not C,Shall,don't D,May,must't2.Could I look at your pictures?-----Yes,of course you___A,could B,can C,would D,must3.___I leave all the What makes you think that I cann't swim at all?改被动语态_______ _______ ________ you _______ _______ think that I can't swim at all? I could swim at the age of seven同义句I could swim _______ ________ I could swim at my age of five .同义句 ----------you------------(swim) at the sports meeting yesterday? Are you good at （swim） 用could,must,mustn't填空.look at the sun.it （）be 12.we have to go home for lunch.2.lt’s dangerous.you （）swim in the lake.3.the pen isn't yours.whose（）it be?4.you （）be hungry after all that walking.5.be quiet!you（）talk in Li Fang could swim when she was six years old.【改为同义句】 LiFang could swim at the------ ------six. I could swim at the age of six 同一句转换 I could swim ______ _______ ______ six can't,that,you,in,river,swim the girl can swim now,but she could't swim in the p() ----Could you tell me____?----Sorry,I don`t know.I was not at the meeting. I didn't know she could swim 中为什么用could i could swim at the age of ten为什么用at 10.could you post the letter forme please?—— 1.yes I could 2.no I couldn’t 3.with pleasure10.could you post the letter forme please?——1.yes I could 2.no I couldn’t 3.with pleasure 4.not at all