it作形式主语的问题it 作形式主语的句型是 it + be动词,还是it + 谓语动词?
问题描述：
it作形式主语的问题
it 作形式主语的句型是 it + be动词,还是it + 谓语动词?
答
这两种形式都有。比如：
It is easy to finish the task .
It seems that Tom has known about this.
It happend that I didn't bring any money with me that day.
答
加系动词,但是不一定只是be结构,很多动词既可以做系动词也可以做谓语动词,比如feel,look.