from time to time 后动词用to do还是 doing
3个回答

from time to time 是作状语的介词短语 一般应放在动词后面 可以修饰谓语动词 也可以修饰非谓语动词如 he plays from time to time he from time to time plays . from time to time playing ,he still studies well. to play from time to tome ,he doesn't do much work