could是can的过去式
could
美 /kəd,kʊd/英 /kəd; kʊd/
aux.能够, 可以;可能;差点就,本来有可能;很想
v.能(can 的过去式)
双语例句:
I could win the game but I failed.
我本可以赢得这场比赛,但我失败了。
Could you please give me one more apple?
你能再给我一个苹果吗?
He could stay up for several days when he was young.
他年轻的时候可以熬夜好几天。