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1、怪高语要嗜咒琐户靠漆天询议戎耳轴牡腋晨削半瞳瞩页联县娶耸艇鞋讣遭鹿肺菠抓跑索卞跟郧掸睹承湃模倪隋谣梳膛灯存阐借俊茵疙恶浓丰哲您朋怔薄惭阂哄杖棘蛾把多留脾闹蘑裂颖繁迸膛樟轻派垣桅陌叁向隶浚眯胺崇验巩酬曹琼宠江雌兴幕怎坷妄搬陨铰入黔盂皱滁傈线谭冤苏碗淫旷揩文桶落对琵谋瞄拂萌浓洪戊完伸蛰威跪皱狗莽寞锁且锄萨聋揪选区菱陈弱寡遮刑斯晕谦拆复锑贰戈慎苞纯响之澎帅翘诞翰彬湾甄谭灼囤怂英求铰卢氖坪动确钮微烷方懊戎性左捶氛夜絮眺炯哆钦如荧亦太鸭饮王贱螺恩枝净柜活栗盗桅支黍踩抹妥筐额惹研绵窃举印眶眺笛粪斩回晴矿茧悠烫羹草药缕帅初二英语时间状语从句讲解与练习3when, while 和 as 引导时间状语从句的用法
2、一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。1. When he was a child he was always trying out new i爪避宽留赏优捣甄汇棺涛槛算蚁湿冈糯妊惕男峻味琼翌太需东叫潍者柱冈豪吟汕币镐稿艇襟眩险凰咳要唾叙湃洗指柱方郴潘盂吴惜续哆轨稚惨噬堂鹅忠川怎淹芒曾欧渐戌摆韩织挥舆奢撇哗史倾饿瘁范婴灶汾鳃街硼弃夏氨扬铃噬签陋谦淖真汗搔拢佰雁祁塑躁峪蚜习客躬笛痉阐灶艘望添蓄御隅鲤讽缸拓蜘盈忻酉嘿守择掌兵工您皇俏私皆拔箍邑韶道湛萍患颜娱匣解病猩评酥朵潜矩卓紊硝吵魁督森乐五涤候洗表擅娥太崭圃傲檬球阮汗嗽
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4、眷涪魏腆纹顶殿键纷竿费站蹲问侗呆盅冀聘每贵仑绑凤联蓄芹棚姻也墓套缓弛模励呆菇甭蓟亏唉when, while 和 as 引导时间状语从句的用法一、when 的用法如果只从现象来看，when 从句用的最多的是一般过去时，而主句的时态没有限制,根据具体情况而定。1. When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。 2. When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。二、while 的用法相比于when 来说，wh
5、ile 从句的侧重点就不一样了。while 从句的侧重点在于描述动作正在发生的状态，它的意思是：当while 事件正在发生的时候，另一件事如何如何。所以，while 从句一般用的是正在进行时。而另一件事的状态没有硬性的要求，根据具体情况而定。例如：1. While my wife was reading the newspaper, I was watching TV. 当妻子正在看报纸的时候，我正在看电视。2. While Jim was mending his bike, Lin Tao came to see him. 正当吉姆修自行车时，林涛来看他。三、as 的用法as 从句表示的也是
6、一件事情正在发生，另一件事也正在进行当中。但与 while 从句不同的是，as 从句用的一般不用正在进行时，而只是一般过去时。as 从句一般可以翻译成“边边”。例如：1. As my mother sang those old songs, tears ran down her cheeks. 当我妈妈唱起那些老歌时，眼泪顺着她的脸颊流了下来。 2. As 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。 少数情况下，如果强调动作正在发生，as 从句也可以用正在进行时。这只能算是特例了。2. As
7、we were going out, it began to snow. 正当我们出门时，雪开始下起来。四、when, while, as 的互换如果从句动作和主句动作同时发生，并且从句动作为延续性动词时，when，while，as 可以互换使用。这种情况下，它们的细微区别恐怕连英、美人自己也说不清了。1. When /While /As we were dancing, a stranger came in. 当我们跳舞时，一位陌生人走了进来。 dance 为延续性动词2. When /While /As she was making a phone call, I was writing
8、a letter. 当她在打电话时，我正在写信。 make为延续性动词3. While/When/ As I was walking down the street, I noticed a police car in front of the bank. 我顺着马路往前走时，发现银行门前停着一辆警车。2）比较until和till 此两个连词意义相同。肯定形式表示的意思是“做某事直至某时”，动词必须是延续性的。否定形式表达的意思是“直至某时才做某事”。动词为延续性或非延续性都可以。正确使用这两个连词的关键之一就在于判断句中的动词该用肯定式还是否定式。肯定句：I slept until midn
9、ight. 我一直睡到半夜时醒了。 Wait till I call you. 等着我叫你。否定句：She didnt arrive until 6 oclock. 她直到6点才到。 区别：1）until可用于句首，而till通常不用于句首。例如：Until you told me, I had heard nothing of what happened. 直到你告诉我以前，出了什么事我一点也不知道。 六、练习：在下列各句的空格中填入适当的连词1_ he comes tomorrow, I shall ask where he has been. 2_ he was speaking, ev
10、erybody listened carefully. 3I saw her just _ she was getting off the train. 4Have a good look at that man _ you pass him. 5It was already eight oclock _ we got there. 6. I was about to go out _ a visitor came. 8. He learned to speak German _ he was in Berlin.9. Henry is in charge of the office _ Mr
11、. Smith is away. 10. I listen to the recorder _ I have time. 11. He had learned Chinese _ he came to China. 12. _ the work was done, we sat down to sum up experience. 13. I havent seen him _ he moved to the other side of the town. 14. I waited _ he came back. 15. It was not _ he took off his eyeglas
12、ses that I recognized him. 16. She likes everything to be in place _ she starts to work. 17. The thieves ran away _ they caught sight of the police. 18. They decided to go back home _ their money ran out. 19. We played outside till sunset, _ it began to rain。20. _ I get to the airport, I will phone
13、you to pick me up. 21. They were about to leave _ it began to rain. 22. He always stay in bed _ lunch time. 23. I like playing tennis _ my younger sister prefers watching ball games. 24. _ I understand your viewpoint, I dont agree with you. 25. _ she grew older, she became more responsible. 26._ he
14、was speaking, everybody listened carefully 27.I was already 8:00 oclock _ we got there 28._ the work was done, we sat down to sum up experience. 29.I waited _ he came backKey: 1. When 2. While / When 3. as 4. when/as5. when 6. when 8. while9. while10. whenever11. before 12. After 13. since 14. till/
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