条件状语从句有三种
零条件状语从句
If the temperature is 0 degree,water is frozen
第一条件状语从句
就是常见的条件状语从句(我不举例了,看资料吧)
非真实条件句
这是虚拟语气,与现实相反
条件状语从句例句:
1、If you cheat in the exam you’ll never get away with it
考试作弊必予追究。
2、Unless you go at once you will be late
如果你不马上走,就会迟到的。
3、I’ll remember that day as long as I live
只要我活着,我就不会忘记那个日子。
4、In case I forget, please remind me about it
万一我忘记,请提醒我一下。
5、I don’t know if it will rain tomorrow But if it rains tomorrow, I’ll stay at home
不知道明天是否会下雨,但要是下雨的话,我就呆在家里。
条件状语从句表示主句的动作发生的条件、假想、推测或意愿。用连词
if,
unless
和起连接作用的短语
except
that;
in
case
that;
on
condition
that;
provided/providing
that;
so/as
long
as;
suppose/supposing
that
引导。
用法:
1从句表示的条件客观上是现实的,常用陈述语气,如:
If
the
stamp
is
torn,
it's
no
good
for
my
collection如果邮票是破的,那我收集起来就没有用了。
Suppose
all
the
doors
are
locked,
how
will
you
get
into
the
house
假如所有的门都锁上了,你怎么会进到这所房子呢?
2从句表示的条件同事实相违背或不可能实现,通常用虚拟语气。如:
If
I
were
captain
of
a
ship,
I
would
take
you
on
a
voyage
round
the
world如果我是一艘轮船的船长,我将带你航海环游世界。
注意事项:
1用一般现在时表示将来时。
The
meeting
will
be
held
out
of
doors
unless
it
rains除非下雨,大会将在户外举行
2用选择完成时替代将来完成时。
If
I
have
made
a
mistake,
I
will
try
to
remedy
it如果我犯了错误,我将会努力改正
3will用在真实条件状语从句中是情态动词,表示意愿或决心,而不是单纯表示将来。
I
will
tell
you
if
you
will
come
on
Friday如果你愿意星期五来,我将告诉你。
还有其他一些情况,你暂时用不到,以后自己多注意。
条件状语就是这个状语是一个条件,“在某种条件下,会……” 常用if ,in case , on condition等词来引导 连接词主要有 if, unless, as/so long as, on condition that,provided,suppose,supposing 等。 主句用一般将来时,if或unless引导的条件状语从句用一般现在时。 一般将来时就是将来时的一般形态,就是will。将要怎么怎么样。 一般现在时就是谓语是原形。
条件状语和原因状语的区别在于引导词不同。
1 引导条件状语从句的连词有:
if 的用法。其意为“如果”。
What is to become of me if you go away
如果你走的话,我的结果将是怎样呢
unless 的用法。其意为“如果不”、“除非”。
The company won't keep going unless we can get some loan
除非我们能搞到贷款,否则公司就维持不下去了。
as [so] long as 的用法。其意为“如果”、“只要”。
My life seems to leave me like the sand flowing I can hear that, but I can still smile only as long as I see you sleeping by my side
我的生命正在慢慢地离开我,好象沙子从沙漏中流走一样,我听到了那流逝的声音,但只要你还熟睡在我身旁,我就依然笑得出来。
supposing(suppose):假如。
Supposing his plan goes wrong, what will you do then
provided;providing:只要。
I’ll dry the dishes, providing that you do the washing-up
如果你刷盘子,我就将它们擦干。
in case:以防、防止。
In case memory is low, unused sessions are written out to permanent storage so they can be retrieved if the user comes back to the computer before the sessionexpires
在内存不足的情况下,没有使用的会话就被写入持久存储中,这样当用户在会话到期之前回到计算机上时,可以检索到这些会话。
only if:只要;只要……就;只是在……的时候;只有。
This, of course, will happen only if you spend time to reflect on your life and work
当然,这一切只是发生在你花时间来仔细思考你的生活跟工作之后。
2 引导原因状语从句的连词有:
as:因为。
He is afraid of speaking in front of the class as he is shy
他害怕在班上讲话,因为他害羞。
because:因为(通常回答why)。
I did it because they asked me to do it!
我做这事是因为他们请我做啊!
since:既然。
We have to resign ourselves to fate since we cannot think out an effective remedy
既然我们想不出一个有效的挽救办法,我们只好听天由命了。
for:因为。
He must be at home for there is light in his room
他肯定在家,因为他家有灯。
in that:在于(后面接原因)。
Karzai is a good person in that he brings peace, and brings a lot of clinics in the villages and hospitals to the city
因为卡尔扎伊带来了和平,在许多村庄开设诊所,并在城市中修建了许多医院,他是个好人。
now that:既然;因为。
Now that you put your hand to the work, you should do your utmost to finish it
既然你已经着手这项工作了, 那就应该尽力完成它。
状语从句的分类:
时间状语从句
凡是从句都必须有引导词,引导时间状语从句的词有when,before,after,until,as soon as,while 等。
条件状语从句
主要看一下由if引导的条件状语从句。if 意为“如果”,引导条件状语从句时,表示假如有从句的动作发生就(不)会有主句的动作发生。
例如:
If it doesn't rain tomorrow,we will go there by bike如果明天不下雨,我们就骑自行车去那里。
If I get there early,I can see the doctor quickly如果我早早地到那里,我就可以快点看病。
地点状语从句用法要点
常用where(哪里)和wherever(无论哪里)eg
Where there is a will,there is a way 有志者,事竟成。
We will go wherever the motherland need us most 我们要到祖国最需要的地方去。
原因状语从句用法要点
常用的引导连词有because,as和since,三者的区别是:在回答问题的时候,使用because;对于显而易见的原因,常用as或since;as和since的从句常放在主句之前,而because的从句常放在主句之后。eg
Why did you go? I went because Tom told me to go 你为何去?那是因为汤姆叫我去。
He was angry not because we were late but because we made a noise
他很生气不是因为我们来迟了,而是因为我们弄出了声音。
As it was raining hard,we had to be indoors 由于雨太大,我们只好呆在家里。
Since you feel ill,you'd better not go to work 既然你感觉不舒服,你最好不要去上班了。
目的状语从句用法要点
常用的引导连词有so that,that和in order that译为:以便,为了,目的是。eg
Please speak more slowly so that we can make full notes 请讲慢一点,以便我们能作详细笔记。
I shall write down your address that I may not forget 我要把你的地址记下来,以免忘记。
I sent the letter by air mail in order that it might reach him in time 这封信我以航空信发出,以便他能及时收到。
注:目的状语从句可以用动词不定式来替换做目的状语。eg
We work harder than usual finish it in a week 我们比平常加倍努力工作以在一周内完成工作。
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