did同was,were用在問題上的分別?
我不太清楚did同was or were 同在問題開始時的分別.
例如:Were they pleased with their present?
為什麼會用were而不用did??還有,有沒有什麼詞語可以提示我們?又有沒有一些字詞 or tenses (eg,-ing) 是不可以跟着did or was,were?
另外我還有一個問題:
should,ought to,must 同have 是有什麼分別?
eg:
A: what time do we have to meet?
B: all of you must be at the ferry pier at eight o'clock.You mustn't be late.We won't wait for you!
希望我的問題可以解決,因為我就快exam,所以真的很希望知道.