基本结构：
主语+动词过去式+其他；
否定形式①was/were+not;②在行为动词前加didn't,同时还原行为动词；
一般疑问句Did+主语+do+其他.
特殊疑问句 疑问句词+did+主语+动词原形+其他
肯定式
I worked
He(she,it) worked
We worked
You worked
They worked
疑问式
Did I work?
Did he(she,it) work?
Did we work?
Did they work?
否定式
I did not work
He (she,it)did not work
We did not work
You did not work
They did not work
疑问否定式
Did I not work?
Did he(she,it)not work?
Did we not work?
Did you not work?
Did they not work?
句型
1.一般句子
I watched TV last night.
2.一般疑问句
Did you watch TV last night?
3.there be 句型
There was an apple on the table last night.
Was there an apple on the table last night?
