高考英语 状语从句复习讲解精品PPT课件

While there is life there is hope. (while=___a_s_l_o_n_g_a_s_____)
• 连接词when, while, as的用法区别：
1．while引导的时间状语从句的谓语动词必须是可延续的， 而when引 导的时间状语从句的谓语动词是可延续的，也 可以是表短暂性动作 的动词。如：When/While he was eating his breakfast, he heard the doorbell ring.
(刚要……这时突然……) 记忆
Sb. was dodo sth
+ when…
was on the point of doing sth.
had just done sth
I was walking along the street , when I met him
I was about to fall asleep when my sister came in.
3. 还可以表示原因“既然”，相当于since; considering
连接词while的用法小结
• 1. while引导的动作必须是持续性的，在……期 间，往往指一段时间。如：
• While we were talking, he came in. Please don’t talk so loud while others are working.
• 2. while作为并列连词，意为“而，却”，侧重 主句动作和从句动作相对比。We are cleaning the classroom while they are playing the football.
• 3. while可表示尽管，相当于although。
※while 含义：
While I was walking down the street, I came across an old friend. ( while =__w_h_e_n__)
2. 可以是可延续
也可以是表短暂性动作的动词(非延续性)。
如When the film ended, the people went back.
When I lived there, I used to go to the seashore.
2. 可用作并列连词，其意义为“那时，这时”，相当于
and at this/that time。常用于下列句式：
( 方式 )
1.时间状语从句： 引导时间状语从句的连词有： when, while, as, the moment, before, after, till, until, since, as soon as 等。
请注意 when, while, as 的区别
连接词when的用法小结
1. when引导的时间状语从句的谓语动词
When I stopped my car, a man came up to me. (不可延续，短暂性动词，只可以用when，不可用while) 2．表示“随着……”，连词用as，不用when或while。如：
• As the day went on, the weather got worse. 3．如果主句表示的是短暂动作，而从句用延续性动作的进行时态表示
在一段时间内正在进行的动作时，when, while 与as 可互换使用。 如： When/While/As I was walking down the street, I came across an old friend of mine. 4.从句动作发生在主句动作之前时，只能用when引导这个从句，不可用 as或while。 如 When you have finished your work, you may have a rest.
状语从句的分类
1. While I was wondering at this, our schoolmaster took 2. his place.时( 间 ) 2. Where there is a will, there is a way. ( 地点 ) 3. Now that/Since everybody is here, let’s begin our
meeting. （原因 ） 4. I’ll speak slowly so that you can understand me. (目的) 5. So clever was he a student that he was able to work
out all the difficult problems. ( 结果 ) 6. As long as you don’t lose heart, you’ll succeed. (条件) 7. Try as he might, he could not find a job. ( 让步 ) 8. The old lady treats the boy as if he were his own son.
When the children had gone to bed, she began to prepare her lessons.（这个时候的 when= after）
定义：
在复合句中由从句表示的状语 称作状语从句，它可以用来修 饰谓语或是整个句子。
准确掌握每一个连词的含义是掌握状语 从句的关键。
• 状语从句的位置比较灵活，有时可以放于 句首，有时可以置于句末。状语从句位于 句首时，其后常用逗号与后面的句子隔开。
• 状语从句可以根据其用途分为：
• 时间状语从句、地点状语从句、原因状语 从句、结果状语从句、目的状语从句、条 件状语从句、让步状语从句、比较状语从 句、方式状语从句。
He likes pop music, while I am fond of folk
music. ( while =_b_u__t ___)
While I really don’t like art, I find his work impressive. (while=__a_lt_h_o_u_g_h___)