I want to do it.这里的to是介词吗?

I want to do it.这里的to是介词吗? want to do这里的want 是及物动词还是不及物动词 i do not want to repeat it Get marry I want to do it i want to know how to do和i want to know how to do it. I want to learn how to do这里到底是用what还是How give way to 这里的to是介词吗? I want to do...这里want作谓语动词,那to do做什么呢?或者是want 和to do连起来做着什么? 歌词是i wanna do it girl i wanna do it now.i just want to do it want to do sth词性问题,这里want是及物动词吗?to do是不定式作宾语吗? hold on to do ...中的to 是介词吗[如look forward to doing],那这里do是不是要 I find it is easy to do sth ,这里的IS可加可不加吗