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.
Museums look to innovation for future
Diabetes has its day on stage
Lenovo's new secret weapon: Hollywood star
Screen time leads to bigger waistlines
Laojiao facilities in limbo as detention system to end
Toronto mayor admits he smoked crack
Ancient Chinese built Forbidden City with stones dragged on ice
Women, lean in
Newspaper offers apology after detained journalist's confession
Yili looks to Italy for better milk
Tragedy leads to calls for school safety
US Ambassador Locke to leave post next year
He follows his heart with his feet
Leadership charts path
Hospital denies reports linking cancer case to pollution
Democrats win NYC and Virginia
Far horizons beckon as agencies eye Chinese
Human Library gets people talking
Mixed grades for decision to push back English classes in Beijing
Hukou reform expected to be a gradual process
Experts say more seismic activity could still come
Tickets for 9 yuan offered on new Hebei air route
Xi thanks Clinton for furthering ties
Terror at sea as Thai tourist ferry sinks
New road links remote Tibet county to rest of the country
Xi calls for targeted policies to fight poverty
India launches exploratory spacecraft to red planet
Charles ready for pension, still waiting for job
17 accused of making and selling fake drugs
Europe monitors phones, Internet
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