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2.表示现阶段正在进行着的动作

现阶段正在进行着的动作，不一定指说话时正在进行着的动作。常和at present(目前)，this week(本周)，these days(这几天)等时间状语连用：

We're looking for a house to rent for the summer.

我们在找一栋房子想租一个夏天。

Are you trying to find a furnished house?

你是想找一栋有家具的房子吗?

What courses are you studying this term?

你这学期学哪几门课?

Don't take that ladder away. Your father's using it.

别把梯子拿走，你父亲在用。(即不一定现在用)