spend time后面+on doing还是spend time doing

spend time后面+on doing还是spend time doing spend time on造句 spend time on的造句 spend+ time 后面一定要有“（in）doing”或“on sth”么? spend more time in learning to?为什么不是spend on? 用spend time on造句有翻译 spend some time on sth 造句 Spend time on sth with sb 造句 He needs to spend time on his homework.其中的on可以改为in吗?因为我知道有spend time (in) doing sth.既然in后面可以跟动名词,那好像就可以跟名词的吧? spend doing sth和spend on sthspend doing sth等于spend on it takes sb some time to do sth 等于 spend doing sth 、 spend on why? spend的用法 是TO DO STH 还是DOIN STH spend time in doing sth和spend time on doing sth的区别 spend time on sth 和spend time in doing sth 用法和区别 翻译“ Do not spend the time refused to spend time on you people are right” 英译汉.①sb spend $/time on sth ②sb spend $/time in doing一定要正确, spend time on doing something is correct, is that spend time to do something okay? spend time spend time