modal动词可以；用于can的过去式；（礼貌地请求别人做事）能aux动词想；“can”的过去式；用于假设语气的条件句；用于虚拟语气的结论句网络能够；可能；会
动词
1. I would go if I could.
能去我就去。
2. could的意思
2. You could have been more considerate.
你本来可以更慎重些。
3. could
3. Could you do sth. for me?
你能替我做件事情吗？
4.
4. I could run faster then.
我那时能跑得更快一些。
5. Couldn't you try it again?
你可否再试一下？