[资料共享]英语语法

状语从句
        原因状语从句
        结果状语从句
        时间状语从句
        地点状语从句
        条件状语从句
        让步状语从句

时间状语从句
1. 由when, whenever, as , while, after,
before,  until, till, since, once, as
soon as, 等引导的时间状语从句。
1> When the bell rang, the guard was waiting in his
seat.
2> While ants grow they change their forms three
times.
3> Three months went by before Aqiao knew it.
2. 由the minute, the moment, the instant,
the day, the week, the year, the first time, any time, every time, each time,
the last time, all the time, from the time, by the time, immediately,
instantly, directly 等引导的时间状语从句。
1> 我一见到你就认出了你。
I recognized you the minute I saw you.
3. 其中the minute, the moment, the
instant, the second, 以及immediately, instantly, directly
表达的意思一样, 都是 “一…就…” 可以相互替换。
Eg: You must show the gentleman in immediately he
comes.
You must show the gentleman in the minute /the
moment/instantly he comes.
另外还要注意 hardly …when… ,scarcely…when…, no
sooner…than…的意义和用法。
这三者的意思都是 “一…就…”. 通常都是hardly, scarcely, no sooner 位于句首,他们后面的主句用had done,且倒装.而when, than 后面的从句用一般过去时。
Eg: Hardly/scarcely had I got home when it started to
rain.
when, while, as 引导的时间状语从句的区别。
1> 作为 “当…时”讲,when可以和延续性动词连用,也可以和短暂性动词连用,而while 和as  只能和延续性动词连用。
2> when 从句的谓语动词可以在主句动词之前或之后发生或同时发生.而while 和as 从句的动词必须是和主句的动词同时发生。
    When he had
finished his homework, he took a rest.
    When I got
to the airport, the guests had left.
也就是说当主从句动作同时发生,切从句动作为延续性动词时, 三者可互换。
When/While/As she was making a phone call, I was
writing a letter.
3> when 还有 “在那时” 通常用在以下句型中。
    be about to
do …when…
    had done…when…
    be doing…when…
    be on the
point of doing…when…
4> as 还有 “因为”  “作为” “随着” “一边….一边”
As the time went on, the weather got worse.
The little girl sang as she went.
5> 在将来时的从句中常用when, 且从句必须用一般现在时。
You shall borrow the book when I have finished reading
it.
6> when还用在表示 “一…就…”的句型中。
Hardly/Scarcely had I entered my room when the telephone
rang.
7> while 还做并列连词 “然而” 表对比。和从属连词 “尽管” 的意思, 相当与though/although。
While he is a
little boy, he knows a lot.
I’m working while my wife is watching
TV.

好好好好好好好好好好好好好好