英語中，在問問題時，何時會用Do動詞,何時會用be動詞?

係句問題入面,如果有動詞既話,就用do.
eg. Do you want to go to Kowloon. (want係動詞)
其實係英文句子入面,係有do(or其他)字既,
但係在postive sentence(if有verb)入面,佢係唔會寫出黍既
係negative sentence入面,佢就會出現
eg. I don't want to buy that hat.


相反,係句問題入面,如果冇動詞既話,就用be動詞.
通常都係講feeling,外表...
eg. You are beautiful.
eg. I am very tired.

其它既去
http://www.npc.edu.hk/staff/~ngtungying/english_grammar/lessons/lesson07.htm
幾有用架

2008-07-09 15:24:24 補充：
be動詞:
eg. Are you tired?
eg. Is he handsome?