英语重点语法之时间状语从句精讲.pptxVIP

1. when 的用法;When she came into my room, I was just reading a book. 她走进我房间时，我正在看书。  When I got to the airport, the guests had left. 当我赶到飞机场时，客人们已经离开了。;She was about to go out for a walk when her uncle came. 她正打算出去散步，就在那时她叔叔来了。 She was cooking when someone knocked at the door. 她正在做饭，就在这时有人敲门。;当while 事件正在发生的时候，另一件事如何, while 从句一般用的是正在进行时 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。 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。 ; 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。 While they were talking, the bell rang. 正在他们谈话的时候，上课铃响了。;as 从句用的一般不用正在进行时，而只是一般过去时,一边……一边……” 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。 The little girls sang as they went. 小姑娘们一边走，一边唱。; As the time went on，the weather got worse. 随着时间的推移，气候更加糟糕。 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。 ;　　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 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。 ;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。;肯定句：I slept until midnight. 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。 Dont get off the bus until it has stopped. 公共汽车停稳后再下车。 His mother didn’t leave until/till he was asleep.?直到他睡着了，他母亲才离开。;Not until…在句首，主句用倒装。 Not until the early years of the 19th century did man know what heat is. It is not until… that…. It was not until I began to work that I realized how much time I had wasted. ; She said she would phone m