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1、状语从句,1.时间状语从句（1）,When While As,当,When,I will tell her about it when I see her. I was about to fall asleep when my sister came in. I will go home when he comes back.,When-当时候, 通常指某一特定的时间点，主句与从句的动作同时发生。,When - 正在的时候，突然。通常主句是be doing 或 be about to 或 had just done,When也可以表示先后关系,When也可以表示先后关系,When也可以表示先后
2、关系,I recognized the thief when/ as I passed him. When he finished his lecture, people stood up and applauded. I was walking on the street when I came across an old friend. We were about to set off when it began to rain. He had just finished the work when the doorbell rang. We were on the point of dr
3、iving away when the policeman signed us to stop.,意思为既然或考虑到 (原因状语从句) It was foolish of you to take a taxi when you could easily walk there. How can they learn anything when they spend all their spare time watching television? Why do you want a new job when you have got such a good one? There is no po
4、int （in） owning a car when we have so good a public transport system. Why use metal when you can use plastic? How can he get the promotion when his boss dislikes him?,while,While -在期间，往往指一段时间。,While we were in America, we saw him twice.,While we were talking, he came in.,We are cleaning the classroo
5、m while they are playing the football.,While 表示两相对比。,While 表示让步“尽管”。,While I admit that there are problems, I dont agree that they cannot be solved.,As,As - 一边一边, 随着,She was doing her homework as she was listening to the music.,As she grew older, she became more beautiful. As time goes by, .,Just as
6、,时间状语从句（2）,Not until Since As soon as (immediately, directly) The moment/ the minute Hardly when/No sooner than Every time / each time,直到才,自从,一就,一就,每次， 每当,一就,我什么都不会说，直到你让我说。 2. 直到他回来，我们才开始工作。,I wont say anything until you tell me to.,We didnt start the work until he came back.,not until句型中强调和倒装： It
7、was not until he came back that we started the work. Not until he came back did we start the work.,3. 他们一看到这张照片，就笑翻了。 They laughed as soon as they saw the picture. They laughed the moment they saw the picture. 4. 我刚一到家就开始下雨了。 Hardly had I got home when it began to rain. No sooner had I got home than
8、 it began to rain. 5. 他刚一上去车就发动了。 Hardly had he got on it when the bus started. No sooner had he got on it than the bus started. 6.每当我听音乐，我就想起这事。 Every time I listen to music, Ill think of it.,时间状语从句（3）,before It will be +一段时间+before从句(does) 要过才能做 It will not be +一段时间+before从句 要不了 就能做 It was +一段时间+b
9、efore从句(did) 过了做了 It was not+一段时间+before从句(did) 没过做了,我五年后才能回来。 It will be five years before I came back. 用不了多久他们就会互相了解了。 It will not be long before they understand each other. 五天后他才回来的。 It was five days before he came back. 不久后敌人就被赶走了。 It was not long before the enemy was driven out of their country
10、.,不久我们就动身去北方了。 It was not long before we left for the north. 再过一年你就毕业了。 It will be a year before you graduate. 用不了多久我们就会知道实验的结果了。 It will not be long before we know the result of the experiment. 过了一段时间他们才意识到事情的真相。 It was some time before they realized the truth.,Time passed quickly and three months
11、went by before she knew it. 时间过得飞快，她不知不觉就在那里度过了三个月. He almost knocked me down before he saw me. 他几乎把我撞倒才看到我。 Someonecalledmeupinthemiddleofthenight, buttheyhungup before Icouldanswerthephone. 半夜里有人打来电话，我没来得及接电话就挂了。 The most destructive natural disaster, tsunami, came unexpectedly before the tourists
12、 could leave the coast.,since 自从以来，一般主句用完成式或完成进行时： I have never seen him since I graduated. Ive been learning English since Grade Three in primary school. Ive been feeling down since I lost my job.,It is/ has been +一段时间+ since did: (did为短暂动词) 自从以来已经多久了; (did为持续动词) 不以来已经多久了 It has been twenty days si
13、nce the war broke out. It is ten years since he lived here.,It is three years since he smoked. 他不吸烟有三年了。 It is three years since he began to smoke. 他吸烟有三年了。 It is three years since he joined the army. 他参军有三年了。 It is three years since he was a soldier. 他退役有三年了。 It is years since I enjoyed myself so m
14、uch. 好多年没玩的这么痛快了。,注意：在时间状语从句中，不能用一般将来时、过去将来时态或将来完成时，而要用相应的一般现在时态、一般过去时或现在完成时来代替。如： Ill telephone you as soon as I get there. 我一到达那里就打电话给你。 She said she would phone me as soon as she got there. 她说她一到达那里就给我电话。 Dont get off the bus until it has stopped. 等车停稳后才下车。,2. 条件状语从句,if unless as long as in case,
15、如果,除非,只要,万一,从句中用一般现在时代替将来时,_ weather permits, we will go to the park tomorrow. Youd better take an umbrella _ it rains. I sleep with the window open _ its really cold. _ you listen to me, Ill give whatever you want.,If,in case,unless,As long as,If/ unless/ as long as / in case,You will fail to arriv
16、e there in time unless you start earlier (if you dont start earlier). 如果你不早点动身,你就不能及时赶到那儿。 Well let you use the room on condition that you keep it clean and tidy. 我们可以让你使用这个房间，条件是你把它保持整洁。 Supposing he does not come, shall we go without him? 如果他不来，是不是不带他去? He will do the work providing you pay him. 如果你能付费，他可以做这工作。,3. 原因状语从句,Because Since As,Because 表示直接的因果关系，常放主句后. 回答Why 问句 、 强调原因或有partly, not修饰时 ,只能用because.,Since , as 表示众所周知的原因，常放于主句前，译成“既然”.
