grammar 問題, 唔該

其實呢個原因係同prepositions 有關


在prepositions後面必須係名詞或動名詞...即係 noun 同 verb+ing form


prepositions:

e.g.

in,on,about,to,before ,of,after,for......etc

an unemployed man is being accused of killing two people in the insurance company because he is not satisfied with the compensation....

In this case, we use ing form as the killing is followed by of.
OF is a preposition, we usually use ing form after a preposition!

2008-08-06 18:05:33 補充：
not a must but USUALLY!!