結(jié)構(gòu)形式:
肯定形式
主語+動詞過去式+其它
例句:She came to help us in those day.
否定形式
主語+didn't+謂語動詞原形+其它
、賥as/were+not;②在行為動詞前加didn't,同時還原行為動詞
例句:I didn't know you like coffee.
一般疑問句
①Did+主語+謂語動詞原形+其它②Was/Were+主語+表語
例句:Did I do homework?
特殊疑問句
疑問詞+did+主語+動詞原形+其它
疑問詞+was/were+物主代詞/...'s+sth.