过去时和过去完成时到底怎么用?举例我觉得每一句话都可以用过去完成时,因为都是过去完成的动作.例句:“我刚才已经启动了第二台发电机”I had already started the second alternator just now.还是
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![过去时和过去完成时到底怎么用?举例我觉得每一句话都可以用过去完成时,因为都是过去完成的动作.例句:“我刚才已经启动了第二台发电机”I had already started the second alternator just now.还是](/uploads/image/z/7661586-66-6.jpg?t=%E8%BF%87%E5%8E%BB%E6%97%B6%E5%92%8C%E8%BF%87%E5%8E%BB%E5%AE%8C%E6%88%90%E6%97%B6%E5%88%B0%E5%BA%95%E6%80%8E%E4%B9%88%E7%94%A8%3F%E4%B8%BE%E4%BE%8B%E6%88%91%E8%A7%89%E5%BE%97%E6%AF%8F%E4%B8%80%E5%8F%A5%E8%AF%9D%E9%83%BD%E5%8F%AF%E4%BB%A5%E7%94%A8%E8%BF%87%E5%8E%BB%E5%AE%8C%E6%88%90%E6%97%B6%2C%E5%9B%A0%E4%B8%BA%E9%83%BD%E6%98%AF%E8%BF%87%E5%8E%BB%E5%AE%8C%E6%88%90%E7%9A%84%E5%8A%A8%E4%BD%9C.%E4%BE%8B%E5%8F%A5%EF%BC%9A%E2%80%9C%E6%88%91%E5%88%9A%E6%89%8D%E5%B7%B2%E7%BB%8F%E5%90%AF%E5%8A%A8%E4%BA%86%E7%AC%AC%E4%BA%8C%E5%8F%B0%E5%8F%91%E7%94%B5%E6%9C%BA%E2%80%9DI+had+already+started+the+second+alternator+just+now.%E8%BF%98%E6%98%AF)
过去时和过去完成时到底怎么用?举例我觉得每一句话都可以用过去完成时,因为都是过去完成的动作.例句:“我刚才已经启动了第二台发电机”I had already started the second alternator just now.还是
过去时和过去完成时到底怎么用?举例
我觉得每一句话都可以用过去完成时,因为都是过去完成的动作.
例句:“我刚才已经启动了第二台发电机”I had already started the second alternator just now.还是翻译成 :I started the second alternator just now.
过去时和过去完成时到底怎么用?举例我觉得每一句话都可以用过去完成时,因为都是过去完成的动作.例句:“我刚才已经启动了第二台发电机”I had already started the second alternator just now.还是
例句中 若时间状语用的是“just now”那么就应该用 过去时.
现在完成时的构成:
have/has+过去分词
用法:1.过去发生的动作,对现在造成的影响或结果.(已完成用法)
举例:He has lived here for three years.
改为否定:He hasnn't lived here for three years.
一般疑问:Has he lived here for there years
----Yea,he has .(肯定回答)
----No,he hasn't.(否定回答)
(对时间状语“three years”的)特殊疑问:
How long has he lived here
2.表示过去某一时间开始了,一直延续到现在,可能还要延续下去.(未完成用法)
举例:We have finished our homework.
改为否定:We haven't finished our homework.
一般疑问:Have you finished your homework
----Yes,we have.(肯定回答)
----No,we haven't.(否定回答)
(对“finish homework”的)特殊疑问:
What have you done
与一般过去式的区别:
1.现在完成时表示动作对现在的影响.
一般过去式表示过去动作的事实.
2.现在完成时表示过去开始的动作延续到现在.
一般过去式表示过去的动作已停止.
3.现在完成时不能和表示过去的时间状语连用,只能和表示现在的时间状语连用.
一般过去式和现在不发生关系,它只和表示过去的时间状语连用.
现在完成时的时间状语:just、already、yet、ever、never、befor;
once、twice、three times、some/few times;
so far、by now、up to now、till now;
recently、in recent years、
during/in/over + the past/last + few years;
since +时间点、for +时间段;
now 既可以用现在完成时,又可以用现在进行时.
一般过去式的时间状语:just now/a moment ago;…ago;
yesterday;last;in the past;in +年份
大概就这么多了,都是老师讲的,我可是亲手打上来啊.