as开头后面加什么时态

as可用作连词,引导比较、时间、原因及方式等四种状语从句,应注意的是,引导的比较状语从句往往有省略；引导的时间状语从句一般用一般现在时而不用一般将来时；引导原因状语从句时与“Because”和“since”引导的从句比较起起来语气最弱。

例句

He is very careful,as we all know.

我们都知道，他很细心。

Such a clever girl as she can learn anything quickly.

像她这样聪明的女孩，学任何东西都很快。

I was reading the same book as he bought yesterday.

我正在看他昨天买的那本书。

Remember,you must do everything as I do.

记住，你必须照我做的去做。