PAST

那本书上周不可能在售——它今天才出版！

That book ___couldn't ___have been on sale last week - it only came out today!

他不可能损坏了你的自行车——他整个晚上都和我在一起。

He ___couldn't ___have damaged your bike - he was with me all evening.

你本可以告诉我你会迟到的。

You ___could've told me you would be late.

路面是湿的，昨夜有可能下过雨。

The road was wet this morning. It ___could ___have rained last night.

到底会是谁拿走了那幅画？

Who ___could ___have taken the painting?