I didn't go to school yesterday.
I went to school yesterday.
Did you go to school yesterday?(第一人称变为一般疑问句，通常改为第二人称提问；如果必须用I，那么是自己对自己做过或说过的不确定，如：Did I tell you about it yesterday?)
She/He was not good at doing housework.
She/He was good at doing housework.
Was she/he good at doing housework?
They didn't go to USA last year.
They went to USA last year.
Did they go to USA last year?
希望能帮到你哦～
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