Its time to/for sth

Its time to do sth.和 Its time doing sth.有什么区别? it is time for sth.与it is time (for sb.) to do sth.区别 its polite to do sth have time for sth 用It's time to do sth 和It's time for doing sth 造句 it is time to do sth.It is time for doing sth.一样么 It’s time to sth 还是 It’s time for sth? It’s time for doing sth=It’s time to do sth 成立吗 It is time to do sth和It is time for sth有区别吗? 用it’s time for sb to do sth造句 It is time for.../to do sth.造句 It‘s time for sb.to do sth同义句