It's time for和It's time to的区别以及例句和练习题

It's time for sth./doing sth.
It's time for sb.to do sth.
It's time to do sth.
这四个句型可以互换!
e.g.
It's time for dinner.=It's time for having dinner.=It's time for us to have dinner.=It's time to have dinner.
It's time for me __you __English.A.helping;learnB.helping;to learnC.to help;learningD.to help;learm