could的短语搭配

The operation could prolong his life by two or three years.

这次手术可使他多活两三年。

Only with a few people could she be her real self.

只有和几个人在一起时，她才能表现出真实的自我。

I could come next week, or the week after.

我可能下周来，或者再下一周。

Could you put me through to the manager, please?

请帮我找经理接一下电话好吗？

Could you just help me with this box, please?

请帮我搬一搬这箱子好吗？