1、She can sing the song in English.她能用英语唱这首歌。
He will be able to sing this song in English in a few minutes, too.几小时之后，他也能用英语唱这首歌。
2、Luckily, he was able to escape from the big fire in the end.幸运的是，他终于逃出了大火。
If he got here a few hours earlier, I could save him.要是他早几小时来，我还能救他。
3、I could help you last night, but you didn’t come.昨天晚上我能帮你，而你又没来。
Can you see it there?你能看见它在那儿吗？
He is / was / will be able to help you.他能帮你的忙。
