EG:Antonio DROVE to the store, and Cristina BOUGHT some ice cream.
Laura LOCKED the dead bolt before she LEFTfor work.
3
．Trick一枚：有时候我们可以在前一个分句中用一般过去时表示“过去”，在后一个分句中
用过去完成时表示从
“过去”一直延续下去。即一般过去时在过去完成时之前。
EG:The band U2 was one of many new groups on the rock music scene in the early1980's, but less than ten years later, U2 had fully eclipsed its early rivalsin the pantheon of popular music.
（四）虚拟语气
虚拟语气常见的两种形式：
1. 看起来不可能或者不真实的条件，用if, as if, as though引导
Right: Toovercome my fear of germs, I will think about disease as though it WEREharmless.
