一般过去时的否定句（negatives）
使用 didn't (did not) + 动词原形

（过去的某个时间）我工作 I worked —> 改否定

I didn't work.

You didn't work.
He / She / It didn't work.
We didn't work.
They didn't work.

I did not work.
You did not work.
He / She / It did not work.
We did not work.
They did not work.

疑问句（questions）
使用 did + 主语 + 动词原形

Did you work?
Did he / she / it work?
Did we work?
Did they work?
Did I work?

练习
I lived in the UK last year. 

改成疑问句 —>
Did you live in the UK last year?
改变人称 —>
Did he / she live in the UK last year?
Did they live in the UK last year?

简短回答（short answers）
Yes, I did. / No, I didn't.
Yes, you did. / No, you didn't.
Yes, he/she/it did. / No, he/she/it didn't.
Yes, we did. / No, we didn't.
Yes, they did. / No, they didn't.