could和was able to和manage to有什么区别?could，be able to，manage都表示已经做成某事？

could 和was able to 的区别? could和be able to的区别 could和was able to和manage to有什么区别?could，be able to，manage都表示已经做成某事？ be able to和could表示过去实际上可以做到的事时只用was/were able to不用could那这个怎么解释I was able to speak English中的 was able to 可以换成could求精简的解释,注意针对问题回答 be able to 和could/can 有什么分别 can,could和be able to的区别 be able to和canI went there in 1984,and that was the only occasion when I ________ the journey in exactly two days.A.must take B.must have madeC.was able to make D.could make can/could和be able to在这两个句子里的区别,为什么不能替换为什么 after a lot of studying,he was able to pass the exam 和 despite the bad weather,the climber were able to reach the top by noon这两个句子里的be able to不能 could & was/were able to do 的区别 could,was able,managed to,succeedin的区别 be able to 和can的区别The chemist was open,so luckily I ( ) buy some aspirin.A.can B.was able to我问一下如果把A改成could是不是就行了be able to 不是指有能力做某事吗?为什么可能用的这里啊,这里的空格好像意 关于英语词组的用法be able to和could有什么区别? Could 和 Be able to 各用在什么情况下,两者有什么不同? Michael______come.That's too bad.I thought he could comeA.isn' able to b.is able to C.wasn't able to d.was able to He was able to run away before the war broke out.可否将 was able to 改为could为什么? Could you please tell me if he ___finish the work on time A.could B.was able to C.is able to D.would be able to ,为什么? could you tell me if he_______finish the work on time?A.could B.was able to C.is able to D.would be able选哪个?为什么? He didn't agree with me at first,but I___persuade him to sigh the agreement later.A.could B.might C.should D.was able to 求答案和句子意思