She was playing the piano while I was reading the newspaper.可以变成She played the piano while I readed the newspaper.什么情况过去进行时可以变成过去时`

She was playing the piano while I was reading the newspaper.可以变成She played the piano while I readed the newspaper.什么情况过去进行时可以变成过去时`
She was playing the piano while I was reading the newspaper.
可以变成She played the piano while I readed the newspaper.
什么情况过去进行时可以变成过去时`

She was playing the piano while I was reading the newspaper.可以变成She played the piano while I readed the newspaper.什么情况过去进行时可以变成过去时`
可以
1.She hesitated for a minute and stood still while a tear or two fell on the worn red carpet.
她迟疑了一会儿,呆呆地站在那儿,同时一两滴泪水溅落在那破旧的红地毯上了.
2.“Della,”said he,“Let's put our Christmas presents away and keep'em a while….”
”他说“德拉,咱们把圣诞礼物收好,先保存一段时间.…”
这两句话中出现的while一词,用法不同.前一个作连词,意思为“与此同时”.后一个作名词,意思为“一会儿”.
为了帮助同学们更好地掌握此词在各种语境中的用法,现做如下总结：
一、while作名词用,表示“一会儿”“一段时间”
1.She likes to lie down for a while after lunch.
她喜欢午饭后躺一会儿.
2.Coming to another country to study requires a big adjustment and it takes a while to fit in.
来到另一个国家求学,需要花一段时间来适应.
二、While作连词
(1)引导时间状语
1.We must strike while the iron is hot.
趁热打铁.
2.While she was listening to the radio,she fell asleep.
她听着收音机睡着了.
(2)引起让步状语从句,意思是“虽然…但是….”、“尽管…但是…”(多放于句首)
1.While he loves his students,he is very strict with them..
虽然他爱他的学生,可是他对他们很严格.
2.While these experiments are interesting and useful,it is important to remember that they may not always tell us much.(BookIIIp125)
虽然这些实验很有趣也有用,但是很重要的是要记住,这些实验也可能不会告诉你很多.
(3)引起条件状语,意思是“只要”
1.While there is life there is hope.
只要生命存在,就有希望.
2.While there is a way there is away.
有志者事竟成.
三、While作并列连词用,意思为“而,然而”,表对比.而but表转折.注意用心比较体会while与but的句中用意
1.Some people waste food while others haven't enough.
有些人很费粮食,然而有些人却吃不饱.
2.The son was having a good meal at home,while the parents were working in the fields.
儿子在家吃好饭而父母却在田里辛勤劳作.
3.I ought to have helped her,but I never could.
我本该帮她但没能.
4.Honey is sweet,but the bee stings.
蜂蜜很甜,但蜜蜂有刺蜇人.
四.while,when,as的用法区别
都译为“当…的时候”,区别为：when后的从句谓语动词既可是延续性动词,也可是短暂性动词,而且还可作并列连词,译为“这时”.但以下句型一定用when,作并列连词：
句型A：be about to do…when…正要做…这时(发生另一事)
句型B：was/were doing…when…正在…这时(发生另一事)
句型C：had done…when…刚要做…这时(发生另一事)
1.We were about to set out when it began to rain.
我们刚要出发天突然下雨了.
2.He had hardly sat down when his mobile rang.
他刚一坐下手机就响了.
3.I was walking along the bank of the river when I fell into it.
我正沿河岸散步突然掉进水里.
while后的从句谓语动词只能是延续性动词,强调主从句的两个动词同时发生；while也可作并列连词,表示两个动作的对比,译为“而”“然而”.as则表示两个变化中的动作的同时性,译为“一边…一边…”.
1.While his mother was cooking in the kitchen,the boy fell asleep in the chair.
(在一个延续动作过程中发生另一个动作)
2.He hurried home,looking behind as he went.
他匆匆回家,边走边往后看.

不能，因为这个while强调主句与从句动作同时发生或进行！
when，while，as引导时间状语从句的区别
when，while，as显然都可以引导时间状语从句，但用法区别非常大。
一、when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用。
① Why do you want a new job when youve ...

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不能，因为这个while强调主句与从句动作同时发生或进行！
when，while，as引导时间状语从句的区别
when，while，as显然都可以引导时间状语从句，但用法区别非常大。
一、when可以和延续性动词连用，也可以和短暂性动词连用；而while和as只能和延续性动词连用。
① Why do you want a new job when youve got such a good one already？（get为短暂性动词）你已经找到如此好的工作，为何还想再找新的？
②Sorry，I was out when you called me．（call为短暂性动词）对不起，你打电话时我刚好外出了。
③Strike while the iron is hot．（is为延续性动词，表示一种持续的状态）趁热打铁。
④ The students took notes as they listened．（listen为延续性动词）学生们边听课边做笔记。
二、when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生。
1．从句动作在主句动作前发生，只用 when。
①When he had finished his homework，he took a short rest．（finished先发生）当他完成作业后，他休息了一会儿。
②When I got to the airport，the guests had left．（got to后发生）当我赶到飞机场时，客人们已经离开了。
2．从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用。
①When ／While ／As we were dancing，a stranger came in．（dance为延续性动词）当我们跳舞时，一位陌生人走了进来。
②When ／While ／As she was making a phonecall，I was writing a letter．（make为延续性动词）当她在打电话时，我正在写信。
3．当主句、从句动作同时进行，从句动作的时间概念淡化，而主要表示主句动作发生的背景或条件时，只能用 as。这时，as常表示“随着……”；“一边……，一边……”之意。
① As the time went on，the weather got worse．（as表示“随着……”之意）
② The atmosphere gets thinner and thinner as the height increases．随着高度的增加，大气越来越稀薄。
③As years go by，China is getting stronger and richer．随着时间一年一年过去，中国变得越来越富强了。
④The little girls sang as they went．小姑娘们一边走，一边唱。
⑤The sad mother sat on the roadside，shouting as she was crying．伤心的妈妈坐在路边，边哭边叫。
4．在将来时从句中，常用when，且从句须用一般时代替将来时。
①You shall borrow the book when I have finished reading it．在我读完这本书后，你可以借阅。
②When the manager comes here for a visit next week，Ill talk with him about this．下周，经理来这参观时，我会和他谈谈此事。
三、when用于表示“一……就……”的句型中（指过去的事情）。
sb．had hardly（＝scarcely） done sth．when．．．＝Hardly ／ Scarcely had sb．done sth．when．．．
①I had hardly ／scarcely closed my eyes when someone knocked at the door．＝Hardly ／ Scarcely had I closed my eyes when someone knocked at the door．我刚一闭上眼，就有人在敲门了。
②I had hardly ／scarcely entered my room when the telephone rang．＝Hardly ／Scarcely had I entered my room when the telephone rang．我刚一走进房门，电话就响了。

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