状语从句
状语从句是一种副词性从句，通常由一个从属连词或一个起连词作用的词组引导。
状语从句
1. 时间状语从句
常见的连词(组)：
when, while, as, before, after, once, till, until, as soon as, now that, hardly ...when, scarcely ...when, no
sooner ...than等。
可以引导时间状语从句的副（介）词（短语）或名词短语：
directly, instantly, immediately, by the time, the moment, the second, the minute, the instant, every time,
each time, next time, the last time等。
注意点如下：
(1) when, while, as引导的时间状语从句
as表示“当……的时候”，往往和when/ while通用，但它着重强调主句与从句的动作或事情同时或几乎同时发生。when(at or during the time)既可以表示在某一点的时候，又可以表示在某一段时间内，主句与从句的动作或事情可以同时发生也可以先后发生。while强调一段时间，仅表示从句和主句的动作同时发生，并且有延续意义，该从句中的动词一般要用延续性动词，从句中常用过去进行时态或一般过去时态；当when表示a period of time时，两者可以互换。
She came up as I was cooking.(同时)
在我做饭时，她走了过来。
When we were at school, we went to the library every day.(在一段时间内)
当我们在学校时，每天都去图书馆。
高中英语语法之状语从句
时间状语从句
引导时间状语从句的连词有：when, as, while, until, not…until, before, after, since, the minute, the moment, each（every,
next, the first）time等。时间状语从句中一般用一般现在时或一般过去时。
1．when , while, as都可解释为“当```的时候”但侧重点有所不同。
1）When后既可以接短暂性动词，也可以接延续性动词 ，表示从句动作与主句动作同时发生。
When I arrived home , I had a little rest.
2）As 除了表示“当```的时候”，还可表示为“一面```一面”，“随着”
He sang as he danced.（一面```一面） You will grow wiser as
you grow older.（随着）
3）While表示“当```的时候”强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。
While we were working, they were having a rest.
While（they were）having a discussion, they got very confused.
注意：while 有对比的含义，解释为“然而”。eg: I prefer black
tee, while he likes coffee.
2．until, not…until表示“直到`才”,在肯定句中主句常用延续性动词；在否定句中常用短暂性动词。
肯定句：I waited until midnight. 否定句：I did not leave until
midnight.
注意点：1）not until…在句首，主句用倒装 Not until you had
--
-- Grammar —Adverbial Clause
状语从句 定义：用“引导词 +陈述语序”作状语 状语：修饰动作，把句子“壮大” He speaks English well .（方式状语） The sun rises in the east and sets in the west .（地点状语） 九种状语从句：时间、地点、原因、结果、方式、目的、条件、让步、比较 Ilove you you love me (1)when —时间状语 (2)where —地点状语 (3)because —原因状语 (4)so —结果状语 (5)as —方式状语 (6)inorderthat —目的状语 (7) I will love you if you love me. —条件状语 (8) I won ’ t love you even if you love me. —让步状语 (9)more than —比较状语 意思不同，形式不同，形意相关 I read English loudlyin the open airevery morning. --
-- 1 --
-- Grammar —Adverbial Clause 方式状语地点状语 时间状语 用从句形式当状语，即状语从句
(一)时间状语从句引导词
till, until A until B ： A 一直延续到 B 出现或发生就停止 I sleptuntilnoon. I didn ’ t go to bed until midnight. I entered the room until 6:30. I didn ’ t enter the room until 6:30.
状语从句
状语从句在句中作状语，可分为：时间、条件、让步、原因、目的、结果、比较、地点、方式状语从句。
一、 时间状语从句
引导时间状语从句的连词有：when, as, while, until, not…until, before, after, since, the minute,
the moment, each( every, next, the first) time等。时间状语从句中一般用一般现在时或一般过去时。
1． When , while, as都可解释为“当```的时候”但侧重点有所不同。
1) When
Eg: When I arrived home , I had a little rest.
注意点：
when 从句的主语与主句主语相同，谓语动词是be 动词时，从句主语和be可以省略。
Eg: When (she was) walking along the street, she met her class teacher.
2) As
As 除了表示“当```的时候”，还可表示为“一面```一面”，“随着”
Eg: He sang as he danced.(一面```一面)
You will grow wiser as you grow older.(随着)
3) While表示“当```的时候”强调主句的动作和从句的动作同时发生，从句一般用进行时，从句动词必须是延续性动词。
Eg: While we were working, they were having a rest.
While (they were) having a discussion, they got very confused.
注意点：
while 有对比的含义，解释为“然而”。
eg: I prefer black tee, while he likes coffee.
