sb in doing sth
sb in doing sth
help sb in doing sth &help sb to do sth
sb spend some time in doing sth
join sb in doing sth 是什么意思?
sb.spend time(in)doing sth.
sb spend time mony in doing sth
in china-------- like doing sth------- do sth wish sb ------
英语翻译sth is good for (doing)/sb sthdo well in (sth)/doing sth
sb was doing sth
see sb.doing sth.
help sb doing sth
have sb doing sth