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. 将来完成时 1) 构成:will/be going to do sth. 2) 概念 a. 状态完成:表示某事继续到将来某一时为止一直有的状态。 b. 动作完成:表示将来某一时或另一个将来的动作之前,已经完成的动作或一获得的经验。 They will have been married for 20 years by then. You will have reached Shanghai by this time tomorrow. #g_kclist{font-size:12px;width:100%;float:left; margin-top:5px;} #g_kclist a{color:#000; text-decoration:none} #g_kclist h2{margin:0px;padding:0px;font-size:14px; text-align:center;background:url(/pets/Files/2011-5/13/167454458.jpg ) no-repeat;line-height:31px;color:#fff} #g_kclist table{line-height:25px;background:#0056A3;margin-top:8px} #g_kclist table td{ text-align:center;background:#fff} #g_kclist table td.td1 a{color:#f00} #g_kclist table th{background:#F2F7ED;color:#525F46} .STYLE2 {font-size: 12px}
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