its subtle and a lot of nuances there ! no easy answers...

来源: 忌忆 于 2009-10-21 10:52:43 [] [旧帖] [给我悄悄话] 阅读数 : (166 bytes)

but two suggestions are

- to read original english grammar books
- to use the dictionaries (cambridge) with the mark of countable and uncountable nouns.

请您先登陆，再发跟帖！