上海牛津高一英语上U4 grammar-状语从句
Unit 4
上海牛津高一英语上U4 grammar-状语从句
状语从句的引导词分 类 连接付词(引导词)
When, as, while, before, after, until, 时间状 since, as soon as, hardly…when---, 语从句 no sooner….than , the moment, by the time, The first time…,Every time… 原因状 Because, since, now (that) , as , 语从句 seeing…(that) , considering (that),
上海牛津高一英语上U4 grammar-状语从句
地点状 Where, wherever 语从句
If(假如) , unless, as(so) long as, 条件状 provided(that) , providing (that) , 语从句 in case,once While,although, though, as,even if (though), whether..or(not),whatever, whenever, 让步状 wherever, whoever , whichever, however, 语从句 no matter what ( when, who, which, how) as (虽然、尽管)
上海牛津高一英语上U4 grammar-状语从句
目的状 So that, in order that, lest(以免、唯恐) 语从句 , for fear that (以免、唯恐) 结果状 So, so that, so…that, such…that 语从句 As(按照、和---一样), just as, as if 方式状 (似乎、好像是)=as though, 语从句 the way(---的方式) 比较状 As…as, than , not so…as, 语从句 the more….the more
上海牛津高一英语上U4 grammar-状语从句
上海牛津高一英语上U4 grammar-状语从句
表示时间的状语从句可由 when, as, while, whenever, after, before, till (until), since, once, as soon as ( 或 the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time 等引导。
上海牛津高一英语上U4 grammar-状语从句
before & afterWe need another contestantpast now
before
the show begins.future
After
he seated her on the stage
past
now
future
a make-up artist rushed forward.
上海牛津高一英语上U4 grammar-状语从句
before和after的用法比较：1. Einstein almost knocked me down before he saw me. 2. It will be four days before they come back. 3. My father had left for Canada just before the letter arrived. 4. After you think it over, please let me know what you decide. 5. After we had finished the work, we went home
上海牛津高一英语上U4 grammar-状语从句
while & asShe sat on the edge… while she watched. “Right” shouted Lester aspast now future
past
now
future
the audience clapped.
上海牛津高一英语上U4 grammar-状语从句
when, while, as表“时间”的区别1. when当 / 在......时(=at the time that)。 可表示瞬间、时间段，可与主从句所述动 作、事情同时发生，也可有先有后。 It was snowing when we got to the airport.(同时发生) When he got to Shanghai, the ship had already set off.
(先后发生)
上海牛津高一英语上U4 grammar-状语从句
2. while正当(正在)......时(=during the time that)表示同时进行的两个延续动词 所表示的动作同时发生。 Please write while I read.(=during the time that) Some students were reading while others were writing.
上海牛津高一英语上U4 grammar-状语从句
3. as 当......时(强调 at the same time) ①as 不指先后，而指并相发生，尤指短暂动 作或事件同时发生： As I looked, some one came near. ②as 还可说明两种正在发展或变化的情况： As I get older, I get more optimistic. 【注意】as, when 或while都可以引导时间较 长的“背景”情况。 As / When / While I was walking down the street, I saw something strange in the sky.
上海牛津高一英语上U4 grammar-状语从句
since & until/tillSincepast
MP3 players were introduced in 1997now future
people have taken them everywhere. until/tillpast
we start filming.future
now
Five minutes
上海牛津高一英语上U4 grammar-状语从句
since的用法：since表示从过去某一时间或动作、事情起到目前为止， “自….以 来”。 1. 引导状语从句时，主句用现在完成时，从句中用一般 过去时。 自从他来到我们班以来,他的学习成绩提高了许多. His study has improved a lot since he came to our class. 2. 常用句型： It is (has been) … + since +一般过去时
自我开始学英语已有5年了(我已学了5年英语了)。It is five years since I began to learn English. (I have learned English for five years.)
上海牛津高一英语上U4 grammar-状语从句
until的用法：1 I didn t go to bed until my father came back. 2 I worked until he came back. 3 I didn't work until he came back.主句中的谓语动词是瞬时动词时，必须用否定形 式；如果主句中的谓语动词是延续性动词时，用 肯定或否定形式都可以，但表达的意思不同。
上海牛津高一英语上U4 grammar-状语从句
till和until的用法比较：till和until一般情况下两者可以互换，但是 在强调句型中多用until。 I didn t go to bed until(till) my father came back. It was not until the meeting was over that he began to teach me English.
