16 用一般过去时代替完成时 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. 【查看更多】
