原因、目的、结果状语从句精讲
原因、目的、结果状语从句讲练
一、原因状语从句通常由because, since, as, for等词来引导。
连词because, as, since, for的用法区别:
because
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示原因时，用法最为广泛，语气也最强。它所引导的从句可以放在主句之前或在主句之后。
例:
1) -- Why are you always late for school? – Because my home is far from here.
你为什么总是迟到,因为我家太远。
2) He can’t come to the party because he is busy.
因为他忙，所以不能来参加这个聚会。
as在表示原因时，语气较强。它所引导的从句常放在主句之前，意思是“由于”;把众人所知的事实当作理由。
例:
1) As the bad weather, he was lost his way yesterday morning.
由于恶劣的天气，他昨天早晨迷路了。
2) As Mr. Liu is the new comer, he doesn’t have too many friends here.
刘先生由于初来乍到，因此在这儿没有太多的朋友。
since语气较弱。它所引导的从句一般放在主句之前，意为“既然”;就对方陈述的事实作为理由。
例:
1) Since Li Ming doesn’t know the answers to the problems, let’s ask Wang Lei to do it.
既然李明不知道这道题的
答案
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，那就让王磊来回答吧。
2) Since we are good friends, please call me if you need help.
既然我们是好朋友，如需要帮助，请尽管打电话。
相比较而言，for的语气最弱。其引导的从句放在主句之后，所表述的理由是对某一事实进行推断。
例:
1) He thanked me for my help.
他因为我帮助了他而感谢。
2)The woman didn’t buy that coat for it is too expensive.
那位女士没有买那件上衣是因为它太贵了。
二、目的状语从句一般由in order that, so that来引导。二者都表示“以便、为的是”之意。此时，句中往往会用一些相关的情态动词来加以说明。
例:
1) I’ll have to run fast so that I can catch up with them in a short time. (目的)
我得快跑以便我能在短时间内赶上他们。
2) I opened the window so that fresh air could come in. (目的)
我把窗户打开以便新鲜空气可以进来。
3) We will tell you everything about it soon in order that you can prepare for
that.
不久我们将会让你知道详情,以便你能够做准备。(目的)
三、结果状语从句通常由连词so„that, such„that引导。二者都表示“如此„以至于”
之意。
例:
1) The teacher’s teaching was so interesting that all the students were very excited.
老师讲课非常有趣，学生们都感到很兴奋。
2) Jack studies so hard that he always makes progress.
杰克学习很是努力，结果他不断取得进步。
3) It’s such a nice day that all of us want to go camping.
天气是如此的好，我们大家都想去野营。
? so „that „ 与such „ that„的用法区别:
so + 形容词或副词 + that + 从句
such + 形容词+a(an) + 单数可数名词 + that +从句。但是这两种句型往往可以互
换。
例:
1) My grandfather is so kind that everyone likes talking with him.
(= My grandfather is such a kind person that everyone likes talking with him)
我爷爷心地善良，大家都喜欢和他聊天。
2) It is so cold that I have to wear warm clothes.
(= It is such cold weather that I have to wear warm clothes.)
天气如此的冷，以至于我不得不穿上暖和的衣服。
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