for it

用作形容词的意思：

1.必受惩罚，准备挨整，自讨苦吃，即将遭到麻烦

用法及例句：
If Father gets to know what you are doing,you'll be for it.要是父亲知道你在干这种事，你就有苦头吃的了。

You're really for it when he gets his hands on you.你要是落在他手里，可真有麻烦受的了。

2.对…感兴趣，赞成，同意

用法及例句：
We went to the boss with the idea and he's all for it.我们去向老板提意见，老板表示完全同意。

3.应变，应急，适宜

用法及例句：
There was nothing for it but to give away.已经无法应付了，只好放弃。

4. (与 jump, run,dash, swim 等连用表)逃命

用法及例句：
The boat overturned, and the occupants had to swim for it.船翻了，船上的人只得游水逃命。*见

in for it

英汉词典参考：  

for  

it