In English, its natural to say the following sentence:
'I will revise for my exam.'
In the above case, it could be argued that the word 'for' is being used as an idiom since you are revising for your own benefit and not the exam's benefit.
In Mandarin, I have heard the following phrase spoken:
This sounds partly unnatural; I can't put my finger on it - maybe I'm wrong. My question is, is there a succinct or better way to express doing X for Y as in the above case, maybe comparable to English? Is the use of
替 here wrong?
I suppose it wouldn't be so unnatural to say something like
我要复习因为我有考试 however, this is rather long winded.