could't do 和could't have done还有could do,could have done的区别和用法

could't do 和could't have done还有could do,could have done的区别和用法 could和couldn't的不同 She doean't think she could do that变反意疑问句 I don't think i could never do for could you please don't to do 还是could you please not to docould you please don't do 还是could you please not do The class could hardly believe his word,______?A do theyB doesn't heC could theyD couldn't it could和 must和 couldn't 的区别和用法? they didn't know how they could do it.同义句they didn't know --------- --------- -----------it. could you please句型的否定形式是什么?是 could you please not do 还是 could you please don't do请指教 not...until这个句式可以这样用么?为什么?I didn't believe I could do it until I got to the top.主句中的didn't和后面的until,可以隔（...believe I could do it...）来用么? i don't think he could have done better than that,()?A.do i B.don't i C.could he D.couldn't he we could do whatever we like / want to do 和 we can`t do anything as we thoughtwe could do whatever we like / want to do 和 we can`t do anything as we thought不能像怎么干就怎么干 哪个符合英文说法 感觉是 we can`t do anythin 请问：这两种说法有什么区别?一个是Why don't you do sth.一个是Why do you not to do sth.还有How could you not to do 和 How couldn't you do Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mus...Thanks.You ______ it.I could manage it myself A.needn’t doB.needn’t have done C.mustn’t do D.shouldn’t have done中B和D有什么区别?Catherine,I have could you come over to my house .sorry ,i ---.i have to do my homework first括号里是填could还是 couln't还是 can还是 can't could't have done和can't have done的区别 I don't catch your words 和I could't catch your words 那个对? must,might,could,can't的区别