ahead of time to do还是 doing sth.

ahead of time to do还是 doing sth. waste time to do sth还是waste time doing sth? a waste of time后面是加 doing sth还是to do sth have more time to do sth 还是doing sth have no time to do sth 还是doing got an invitation to do sth 还是 on doing sth/in doing sth/of 英语语法：是spend some time doing sth.还是spend some time to do sth. 是have some time doing sth. 还是 have some time to do sth. have a good time (to do) sth 还是 have a good time （doing) sth expect to do sth还是doing sth? mind doing sth还是 to do sth learn+to do sth 还是 doing sth