You got more work than you could possibly handle. 手头的事都做不完
What do you think it could be? I don't know. 你觉得是什么病呢 我不知道
She could be splinting, or have a p.e. 可能是横膈膜炎或肺栓炎
This is my year. I could have won. 今年是我的机会 我本可以赢的
could learn a great deal from a girl like you. 能从你这样的姑娘身上学到很多
If he were alive, we could have used him 假如他还活着,我们可以用他当筹码