It is the time we ---our homrwork.do还是doing?

It is the time we ---our homrwork.do还是doing? It is something we like to do in our free time just for the “It is something we like to do in our time just for the fun It is time for doing还是to do it is a waste of time doing还是to do 句型转换 IT IS TIME THAT WE SET ABOUT doing our homework 转化为 It's time that we set about doing our homework. 是it is time to do sth还是 it is the time to do sth the best time + to do 还是 doing 请问,It is a waste of time 后该用to do 还是 doing it is time that we should do something for our country.关系词为何 it is fun to do 还是 doing?