1. 到底何時使用did?
did和其它助動詞一樣,本身無意義,自己不能獨立作謂語,只能和其它主要動詞一起構成謂語,用於構成一般過去時的否定句和疑問句,當然也常常用於代替上文中的行為動詞的過去式。如:
I didnt go to school last Sunday. 上週日我沒上學。
Did you buy a new pen yesterday? 昨天你買了枝新鋼筆嗎?
2. did身後的`動詞到底用什麼形式?
有的小朋友總不注意did身後的動詞用什麼形式,在否定句和疑問句中,
did身後的動詞必須用原形。 他昨天沒有在家吃午飯。
[誤] He didnt had lunch at home yesterday.
[正] He didnt have lunch at home yesterday.
3. 我能用be動詞代替嗎?
不管怎麼說,含有行為(實義)動詞的一般過去時的肯定句變成否定句或疑問句時,不能用be動詞,必須用到did!含be動詞的句子構成否定句或疑問句都絕不會讓did露面! 例句:They went to the park last week. (改為否定句)
[誤] They werent go to the park last week.
[正] They didnt go to the park last week.