一般过去时的结构与用法,一般过去时的结构和用法及讲解

动词过去式的变化规则

⑤ 不规则变化

不规则变化

① 在be动词后面加“not”: was/were not

She was not an English teacher one year ago.

② 在动词前加didn't，动词过去式变回原形

She didn't buy a yellow dress yesterday afternoon.

否定形式

① was/were放到句首

Was she an English teacher one year ago?

一般疑问句形式

② 添加助动词did到句首，动词过去式变回原形

Did she buy a yellow dress yesterday afternoon?