引导的时间状语从句

引导的时间状语从句引导的时间状语从句/NUMPAGES9引导的时间状语从句引导的时间状语从句由when,

while,

as引导的时间状语从句。When

you

think

you

know

nothing,

then

you

begin

to

know

something.当你以为自己一无所知的时候，你就是在开始知道一些事物了。

When

truth

is

buried

under

the

ground

it

grows,

it

chokes,

it

gathers

such

an

explosive

force

that

on

the

day

it

bursts

out

,

it

blows

up

everything

with

it.当真理被埋在地下的时候，它在生长，它感到压抑，它蓄存着这么一种爆炸性力量，一旦冒出，它就会炸破一切！

Strike

while

the

iron

is

hot.

趁热打铁。

Will

you

watch

my

clothes

while

I

have

a

swim?

我游泳的时候，请你照看一下我的衣服。

You

can

feel

the

air

moving

as

your

hand

pushes

through

it.

当你的手在空气中挥动的时候，你就能感觉到空气在流动。

Our

headmaster

laughed

as

she

spoke.我们的校长边谈边笑。

when,

while和as的区别

1.when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when有时表示“就在那时”。

例如：

When

she

came

in,

I

stopped

eating.她进来时，我在吃饭。(瞬时动词)

When

I

lived

in

the

countryside,

I

used

to

carry

some

water

for

him.当的住在农村时，我常常为他担水。（延续性的动词）

We

were

about

to

leave

when

he

came

in.我们就要离开，就在那时他进来了。

2.While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。并且while有时还可以表示对比。例如：

While

my

wife

was

reading

the

newspaper,

I

was

watching

TV.

(was

reading是延续性的动词，was

reading和was

watching同时发生)

I

like

playing

football

while

you

like

playing

basketball.我喜欢踢足球，而你喜欢打篮球。（对比）

3.As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。例如：

We

always

sing

as

we

walk.我们总是边走边唱。（as表示“一边……一边”）

As

we

was

going

out,

it

began

to

snow.当我们出门时，开始下雪了。（as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间）

as

when

while的辨析

as

when

while都表示主、从句动作同时发生，三者差异如下：

as表示“一边。。。一边”的意思

when

1、还可以表示从句动词的动作在主几句动词的动作”之前

”或”之后”发生。

when＝and

then;

at

that

moment

(正在那个时候)

while

1、用于时间较长时

2、

强调两个动作同时进行，并表示对比时

有时这三个连词可以互换，有时不可以。

It

was

raining

hard

when

(as)

I

got

there.

我到那里时，正在下大雨。

(

动作同时发生，when可换为as,

但不能换为while，因为get是点动词.)

When

I

had

read

the

article,

he

called

me.

我看完这篇文章之后，她给我打了电话。(

从句动作发生在主句之前，注意时态表达，只能用when

)

When

I

got

to

the

cinema,

the

film

had

begun.

(当)我到了电影院时，电影已经开演了。(从句的动作发生在主句之后，只能用when,并要注意时态)

He

was

about

to

leave,

when

the

telephone

rang.

他正要离开，忽然电话响了。(

此时不能放在句首。主句动词一般表达

“正在”

“即将”.

while,

as不能代替

She

thought

I

was

talking

about

her

daughter,

while,

in

fact,

I

was

talking

about

my

daughter.

他以为我在谈她女儿，然而，实际上在谈论我女儿。(表转折，对比，when,

as都不能代替它)

While

the

alien

was

buying

a

souvenir,

the

girl

called

the

police.

外星人买纪念品时，那女孩给警察打了电话。(表示主句，从句的动作同时发生，while后引导的状语从句的动词必须是延续动词不能是点动词，因为它表示较长时间)

Mother

was

worried

because

little

Alice

was

ill,

especially

as

(when/

while)

father

was

away.

妈妈担心，因为小爱丽丝病了，特别是他父亲不在家的时候。(此时as

,when,

while可通用)由till或until引导的时间状语从句。

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。并且要注意的是：如果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。例如：

I

didn't

go

to

bed

until（till）

my

father

came

back.直到我父亲回来我才上床睡觉。

It

was

not

until

the

meeting

was

over

that

he

began

to

teach

me

English.直到散会之后他才开始教我英语。

I

worked

until

he

came

back.我工作到他回来为止。

I

didn't

work

until

he

came

back.他回来我这才开始工作。

Please

wait

until

I

arrived.在我到达之前请等我。

3.由since引导的时间状语从句。

since引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。一般情况下，从句谓语动词用一般过去时，而主句的谓语动词用现在完成时。但在It

is

＋时间＋since从句的句型中，主句多用一般现在时。例如：

I

have

been

in

Beijing

since

you

left.

自从你离开以来，我一直在北京了。

Where

have

you

been

since

I

last

saw

you?

自上次我和你见面以后，你到哪里去了？

It

is

four

years

since

my

sister

lived

in

Beijing.

我妹妹不在北京住有四年了。

It

is

five

months

since

our

boss

was

in

Beijing.我们老板离开北京有五个月了。知识扩展

1.

It

is

since从。。。以来多长时间了(因为since

+从句或名词，表示一段时间)

It

is

five

years

since

we

met

last

time.从我们上次见面已经五年了。

2.

It

is

+before…(。。。才)

It

was

a

long

time

before

I

went

to

sleep

again.

过了很长时间我才睡着。

It

was

an

hour

before(＝until)

the

police

arrived.

过了一个小时，警察才来4.as

soon

as,

immediately,

directly,

instantly,

the

moment,

the

instant,

the

minute,

等引导的时间状语从句。这些连词都表示“一……就”。例如：

I

will

go

there

directly

I

have

finished

my

breakfast.

吃完早饭，我立即到那里去。

The

moment

I

heard

the

news,

I

hastened

to

the

spot.我一听到消息，马上赶到了出事地点。

As

soon

as

I

reach

Canada,

I

will

ring

you

up.

我一到加拿大，就给你来电话。

【注意】hardly(scarcely,

rarely)…when

/

before,

no

sooner…than相当于as

soon

as之意。主句用过去完成时，从句用一般过去时。当hardly,

scarcely,

rarely和no

sooner位于句首时，主句应用倒装语序。例如：

He

had

no

sooner

arrived

home

than

he

was

asked

to

start

on

another

journey.

他刚到家，就被邀请开始另一旅程。

No

sooner

had

the

sun

shown

itself

above

the

horizon

than

he

got

out

of

bed

to

commence

work.太阳刚从地平线上升起，他就起床劳动去了。

Hardly

had

I

sat

down

when

he

stepped

in.我刚坐下，他就进来了。

He

had

hardly

fallen

asleep

when

he

felt

a

soft

touch

on

his

shoulder.这个阿拉伯人刚要入睡就感到肩膀上被轻轻一触。5.由by

the

time引导的时间状语从句。

注意时态的变化：在一般情况下，如果从句的谓语动词用一般过去时，主句的谓语动词用过去完成时；如果主句的谓语动词用一般现在时，主句的谓语动词用将来完成时。例如：

By

the

time

you

came

back,

I

had

finished

this

book.到你回来时，我已经写完这本书了。

By

the

time

you

come

here

tomorrow,

I

will

have

finished

this

work.

你明天来这儿的时候，我将已经完成此工作了。

6.由each

time,

every

time和whenever引导的时