1、所有时态都是通过动词变化来表现的2、一般过去时的结构:be动词3、一般过去时的结构: 实义动词变化did
肯定句:had
否定句: didn't have
一般疑问句: did ... have
简略回答: 肯定定回答did, 否定回答didn't
肯定句:had
否定句: didn't have
一般疑问句: did ... have
简略回答: 肯定定回答did, 否定回答didn't
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