what are you supposed to do when you meet someone for the first time?为什么要用for的介词呢?
问题描述:
what are you supposed to do when you meet someone for the first time?为什么要用for的介词呢?
for 不是+一段时间吗?
表示时间的究竟是什么时候用什么介词呢?什么时候用in ,on ,at,for呢?
答
(do sth)for the first /second ...time 这是固定短语 "第一/二...次做某事"in +不具体的时间(年、月等)in the year1990/ in Octoberon+具体日子(具体某一天或说出某天的天气状况)on 12,December/ on a rainy n...