put in
1．cause to be in；add使加入；使进入
You find the tea too strong？Just put in more water．你觉得这茶太浓吗？多加些水进去就是了。
He put his head in at the window．他把头伸进窗口。
It's a pity that he forgot to put in some of the important details in his report．很可惜，他忘了把一些重要细节写进报告里。
2．spend time doing sth．花费（时间）；度过（时间）
Altogether，he has put in about four years'work on his thesis．他总共用了4年时间研究他的课题。
There's still a quarter of an hour to put in before the class begins．还要过一刻钟才上课。
3．make a request or application提出申请或要求
If any of the goods arrive in a damaged condition，you must put in a claim within three days．如果到的任何货物有受损情况，你必须在3天内提出赔偿要求。
You won't get the money if you don't put in for it．你如果不提出要求，这笔钱你就得不到。
4．recommend sb．for sth．推荐
His commanding officer is putting him in for the Victoria Cross．他的司令官推荐授予他维多利亚十字勋章。
We are thinking of putting John in for the 100 metres．我们考虑提名约翰参加百米赛跑。
5．do；perform干；做
She always puts in an hour's piano practice after supper．她每天晚饭后练一小时的钢琴。
6．install；fix or supply sth．安装
We put central heating in when we moved into our new house．我们搬新家时安装了中央供暖装置。
7．elect使人当选；选举
Voters put a Conservative government in at the last election．上次选举中，保守党入选了。
8．appoint任命；委派
A security man was put in to check on doors and windows．委派了一个安全人员检查门窗。
9．enter sb．or sth．in a competition参加比赛
She put herself in for the marathon．她报名参加马拉松比赛。
10．enter a port进港
The vessel put in at Xiamen during the storm．船进厦门港躲避暴雨。
11．cut in插话
“Don't forget us，”she put in．“别忘了我们。”她插话说。