幾個簡單既英文問題=3=

1. First of all the meaning of the two sentences will not be different. But we never use OK in these sentences. We should say :
The manager will approve (not OK) your leave request.
2.) (adj)前面是否一定要加(v)?? - no. Example :
She is a beautiful girl - in this sentence : a (article) is put in front of beautiful (adj).

3.)for 同埋 of 後面係咪一定跟名詞(n)?? - yes, it should either be a noun or noun phrase.

2個既意思應該差5多咋=]

其實The manager will OK your request for leave.同The manager will OK
your leave request.個意思差唔多。而adj前面不是加v,adv前面才是加v。
for同埋of是prep.,所以大部份都要加n。