如题所述
首先需要明确的是,主语需要是名词性的词才可,也就是名词,动名词,to do,代词等。
其次,动词在任何情况下是不可以做主语的,除非把它换一种形式,比如上面所说的动词不定式、动名词等.
例如,I told him that nobody was here(nobody做主语)
I tell him that doing exercise is good for our health (把do变成doing,doing exercise 是做主语)