情态动词(can和be able to do)

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/13 18:32:12

can和be able to do在意思上有什么区别？

解题思路：见下
解题过程：
can与be able to区别。
A 情态动词can只有两种时态形式，现在式can和过去式could，而be able to有多种时态形式。
Mary can play the piano. She has been able to play it since she was 5.
玛丽会弹钢琴。她五岁起就会弹了。
B用在过去时中，could经常表示能够做某事，事实上不一定去做，而was∕were able to则表示“过去做成了某事”。在否定句中两者可通用。
He could swim across the English Channel. But he didn’t feel like it that day.
他能游过英吉利海峡，但那天他不想游。
Yesterday I was able to get home before the heavy rain.
昨天我在下大雨前赶到了家里。
如对本题解答还有疑问，可在“继续提问”中留言，我收到后会尽快给你答复。谢谢你的配合！匆忙中难免有疏漏，请多包涵哦。我是菁菁草老师，随时为你答疑解惑!
英语的诀窍就是熟练，办法是多背多练。加油吧！Do your best and you can do the best!
最终答案：略

请问情态动词的用法,请问情态动词,may,be able to,can't ,mustn't,might,have(ha 情态动词的一个问题百科里说“can 和could 只能用于现在式和过去式两种时态,将来时态用 be able to 来表 be able to和can ability to do\be able to \can be able to 书上说只用be able to的情况有一种是位于情态动词后之前还说be able to是情态动词那系动词短语有 be to do和be going to be to do是情态动词短语吗 he will be able to come.这里will是情态动词还是助动词?be able to是实义动词吗? be able to 和 can 的区别比较can 和be able to can和be able to的区别 be able to和can的区别 can和be able to 的区别