its time to后面接动词原形。

its time for后面一般接某人（某部门或机构）+to do sth， 也可以直接加sth.强调的是：是时候做某事了，重在事情，后面要跟名词(n.)或者动名词（也就是动词+ing=v.-ing）

相关介绍

It's time to put our plan into operation.

现在应该执行我们的计划了。

Come on, it's time to go home.

快点，该回家了。

It's time for her bottle.

该给她用奶瓶喂奶了。

After forty years in politics I think it's time for me to call it a day.

从政四十年，我想现在也该退休了。