--i __(can"t/couldn"t) answer the __(rest/finished).they were __(too/very)difficult for me.--i __(can"t/couldn"t) answer the __(rest/finished).they were __(too/very)difficult for me.--french __(paper/tests) are awful.--i"m __(think /sur) i"ve got a l

--i __(cant/couldnt) answer the __(rest/finished).they were __(too/very)difficult for me.--i __(cant/couldnt) answer the __(rest/finished).they were __(too/very)difficult for me.--french __(paper/tests) are awful.--im __(think /sur) ive got a l I can do anything,but I couldn't do everything.为什么后半句can要变成couldn't can’t / couldn’t have i couldn't agree I couldn't help i couldn‘t是什么意思 I looked for my pen ,but I couldn’t find it __(somewhere) I'm hungry ,mum|.--You __.We had lunch only one hour ago.A can't B needn't C shouldn't D couldn't选哪，为什么。D 为什么又不对？ The box was so heavy that I couldn't lift it .中为什么用couldn't 而不用can't The book is so dear that i can't buy it(变简单句)1：__ __ __ __ __ __ __ __ __2__ __ __ __ __ __ __ __ __ I can't agree more和 I couldn't agree more 哪个对? I can't agree more和 I couldn't agree more 哪个对? I couldn't believed that I can't go away from the circle of man 英语翻译I couldn't agree moreI don't agree moreI can't agree more i couldn't go swimming in the lake.i was very afraid同义句i was very __ __ __ swimming in the lake My parents are always afraid that I can't __ __ __ myself 用I can't和couldn't造句(各5句） I hardly hear you 应填can't还是couldn't?如题