一般过去时
发生在过去的一般情况 主句与从句时态保持一致
did(主动) / was/were done(被动)
ex：I changed my mind
my mind was changed by me
提示词
1. it is (high) time that句型里that从句的谓语用一般过去式
2. 句子里出现了 yesterday last year just now等表过去时间的词时也用一般过去时
3. 句子中出现 for + 时间段，且动词是瞬间动词 （少出现）
过去进行时
was doing （主动）/ was being done（被动）
when you arrived （过去时态）, i was doing homework
过去完成时
had done / had being done
i had watched the game for a long time yesterday(过去时间)
过去发生的事情对后来的事情造成了影响
i had cleared（过去的过去） my room ， i felt（过去） very tired
过去的过去对过去造成影响
过去完成进行时
had being doing
by the time jane arrived we had being waiting three for hours
（完成进行时可以翻译成 "一直" 或者 "已经" ）
