"to do sth" fighting "doing sth"感觉这两者作为子句时,似乎是一样的意思,例如下面两句.It is dangerous to play with fire.It is dangerous playing with fire.谁能告诉我这两者的差别?在使用上该如何选择?

do sth to do have sth to do need sth to do plan to do sth come to do sth hope to do sth only to do sth dream to do sth bother to do sth have to do sth want to do Sth try to do sth decide to do sth eager to do sth except to do sth Want to do sth? try to do sth desire to do sth