1) 两个动作如按顺序发生,又不强调先后,或用then,and,but 等连词时,多用一般过去时。
When she saw the mouse,she screamed.
My aunt gave me a hat and I lost it.
2 ) 两个动作相继发生,可用一般过去时;如第一个动作需要若干时间完成,用过去完成时。
When I heard the news, I was very excited.
3) 叙述历史事实,可不用过去完成时,而只用一般过去时。
Our teacher told us that Columbus discovered America in 1492.
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国内英语资讯:Chinas Chongqing donates 150,000 medical masks to Singapore
体坛英语资讯:Messi named in Argentina squad for World Cup qualifiers
我很幸福
桥
家乡的桥
国际英语资讯:COVID-19 infections reach 197,675 in Italy, single-day deaths lowest in six weeks
我看克隆
国内英语资讯:Chinese medical experts install CT scanner to help tackle COVID-19 in Iraq
一条网虫
莲之泪