有咩english book會集中教你一d比較難既gramma?

Get on the internet and do a search and you will find many topics on grammars.
www.ask.com
www.google.com

Also, if you really want to improve your grammar, the best way to do it to write daily in English and have someone revise it for you.

I will be glad to help you but I don't have a Chinese software on my computer so all my feedbacks will be in English, plus I use American English.