过去时态的用法,问句,否定句,时间状语.
问题描述：
过去时态的用法,问句,否定句,时间状语.
答
一般过去时,动词用过去式.如 I bought a book yesterday.
过去进行时.动词用was/were +doing .时间用过去的某个时间.如 I was doing my homework at seven yesterday evening .
过去将来时,动词用would +do ,用表示将来的时间状语,如 He said that he would go to Beijing the next month.
过去完成时,动词用had +done,用表示过去的一段时间或到过去某个时间为止的时间状语.如
We had learned 500 English words by the end of last term.