【英语语法】什么是不定式作状语,珠海IBS英语学校编辑和大家分享什么是不定式作状语,请阅读下文。
什么是不定式作状语?
不定式作状语,可表示动作的目的、结果、原因、条件和方式。
1)做目的状语 表示目的时,不定式可放在句子的前面也可放在句子的末尾。放在句子前面时,不定式常与句子用逗号隔开;而在句子末尾时一般不用逗号隔开。
如:
To get there on time , we set out at five in the morning.
为了按时到达那儿,我们早晨五点就出发了 。
He goes there to enjoy the fresh air.
他去那儿享受新鲜空气。
【比较】to do , in order to do , so as to do都可表示目的,但to do , in order to do的位置既可在句首,又可在句末;而so as to do只能在句末。
如:In order to build a house , he bought some wood and steel yesterday.
He bought some wood and steel yesterday in order to build a house.
He bought some wood and steel yesterday so as to build a house.
为了建房,昨天他买来了木料和钢材。
2)作结果状语 不定式在下列结抅中表示谓语动作的结果,不定式的位置一般在句子末尾。
①表示终结性的动词find, see, hear, learn,discover的不定式,常表示出乎意料的结果,并且,不定式前常有never, only等副词修饰。
如:
I hurried to the railway station yesterday,(only) to find that the train had left.
昨夭我急急忙忙赶到火车站时,发现火车已经开走了 。
I went to the classroom > to discover it empty.
我走到教室,结果发现教室是空的。
②在"so + adj. / adv. + as + to do"中。如:
The scenery is so beautiful as to attract many people here every year.
景色非常美,每年都会吸引很多人来这里。
③在"adj. / adv. + enough + to do"中。如:
He ran fast enough to catch up with Li Lei.
④在"so + adj. / adv. + a(n) + n. + as + to do"中。
如:
This is so interesting a story as to interest children.
这是个很有趣的故事,使孩子们非常感兴趣。
⑤在"such a(an) + adj./ adv. + n. + as + to do"中。
如:She is such a good girl to help you make great progress.
她是一个非常好的姑娘,帮助你取得了很大的进步。
⑥在"too + adj. / adv. + to do"中。
如:
They went too slowly to catch the early bus.
他们走得太慢了,结果没能赶上早班车。
3)作原因状语 不定式表示原因时,一般放在句子的末尾,说明主语的某种心情、情感(glad,pleased,sad, worried,sorrow,excited)戶斤产生的原因。如:
I 'm very glad to hear that Li Lei has been elected secretary of the Party committee.
听说李蕾被选为党委书记,我很高兴。
4)作条件状语 不定式表示条件时,一般放在句首。如:
To be heated,liquid will change into gas.
5)作方式状语 不定式可接在as if/as though之后表示方式。如:
He moved his mouth as if to say something.
他的嘴唇动了动,好像要说什么事似的。
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