as if 后面的语法是什么 怎么用的

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as if 后面的语法是什么 怎么用的~

as if 好像,好似 She spoke to me as if she knew me. 她和我说话的神情,好像她早就认识我似的。 (= as though)

as if 的用法

一、as if 从句的作用 1. 在look, seem 等系动词后引导表语从句。如: She looks as if she were ten years younger. 她看起来好像年轻了十岁。 It seems as if our team is going to win. 看来我们队要胜了。 2. 引导方式状语从句。如: She loves the boy as if she were his mother. 她爱这男孩,就好像她是他的母亲一样。 The child talked to us as if he were a grown?up. 那孩子跟我们谈起话来,像个成年人似的。 二、as if 还可用于省略句中 如果as if 引导的从句是“主语+系动词”结构,可省略主语和系动词,这样as if 后就只剩下名词、不定式、形容词(短语)、介词短语或分词。如: He acts as if (he was) a fool. 他做事像个傻子。 Tom raised his hands as if (he was going) to say something. 汤姆举起手好像要说什么。 She left the room hurriedly as if (she was)angry. 她匆忙离开房间好像生气的样子。 三、as if 从句的语气及时态 1. as if 从句用陈述语气的情况。 当说话者认为句子所述的是真实的或极有可能发生或存在的事实时。如: It sounds as if it is raining. 听起来像是在下雨。 He talks as if he is drunk. 从他谈话的样子来看他是醉了。 2. as if 从句用虚拟语气的情况。 当说话人认为句子所述的是不真实的或极少有可能发生或存在的情况时。从句虚拟语气动词时态的形式如下: (1)如果从句表示与现在事实相反,谓语动词用一般过去时。如: You look as if you didn’ t care. 你看上去好像并不在乎。 He talks as if he knew where she was. 他说话的样子,好像他知道她在哪里似的。 (2)从句表示与过去事实相反,谓语动词用“had+过去分词”。如: He talks about Rome as if he had been there before. 他说起罗马来好像他以前去过罗马似的。 The girl listened as if she had been turned to stone. 那女孩倾听着,一动也不动,像已经变成了石头似的。 (3)从句表示与将来事实相反,谓语动词用“would/could/might+动词原形”。如: He opened his mouth as if he would say something. 他张开嘴好像要说什么。 It looks as if it might snow. 看来好像要下雪了。

AS IF 语法
as if(though)是连词词组,意为“就像……似的,仿佛……似的”。引导状语从句和表语从句。表示猜测、假定、方式等。在平时的学习中,我们应注意以下四点:
一、引导状语从句 as if引导状语从句时,常用虚拟语气。它与表示命令(order)、要求(ask,require,insist, demand)、建议(advise,suggest)等后的宾语从句中的虚拟语气不一样,不能用“should +动词原形”。从句常用过去式(be动词用were/ was都可以)表示现在的情况不真实,而是主观想象或夸大的比喻。还可用过去完成时表示过去,过去进行时表示现在进行时;过去将来时表示将来时。
例如: 1)She opened her lips as if she would say something.
她张开嘴唇像是要说什么似的。
2)He acted as if he were smoking.
他的动作就好像在抽烟似的。
3)Crusoe heard a noise,as if someone was breathing.
克鲁索听到了嘈杂声,好像有人在呼吸。
4)I remember the whole thing as if it happened yesterday.
我记得整个事情就好像发生在昨天一样。
5)It is as if she had known me for years.
她好像认识我许多年了。
注:如果as if从句中的动词是表示状态的be,exist,have,belong to等时,动词一般用过去式。如: He took the dictionary away as if it belonged to him.他拿走了词典,好像词典是他的似的。
二、引导表语从句 as if引导表语从句时,常与系动词be,look,seem,feel,taste,smell等连用,其常用句型为“It+系动词+asif...”。其中it本身无词义,as if后既可用陈述语气,也可用虚拟语气。这主要取决于从句表示的情况是真实的还是虚拟的。
例如: 1)It looks as if it is going to rain.
天看起来要下雨了。
2)He looks as if he is ill.
他看起来像是生病了。
3)Itlooks as if the sky would fall soon.
天看上去好像要塌下来似的。
4)When a pencil is partly in a glass of water,itlooks as if itwere broken.
当一枝铅笔部分在水里的时候,它看起来好像断了。 5)Jack seems as if he has lost his wallet.
杰克看上去好像是丢了钱包。

三、不用虚拟语气的情况 1、当主句的谓语动词是seem,look,feel, smell,taste等系动词时,从句中的情况发生的可能性又很大,从句要用陈述语气。例如: 1)The milk smells as if it is sour.
牛奶闻起来好像是酸的。
2)It seems as if you are the first one here.
你好像是第一个来这里的。
3)The meat tastes as if it has already gone bad.
肉尝起来好像已经坏了。
4)It looks as though we shall have to do the work ourselves.
看起来我们得自己做这项工作了。
2、如果所描述的行为本身是一种事实时,通常用陈述语气。
例如: 1)We've missed the last bus.It looks as if we'llhave to walk home.
我们错过了最后一班公交车。看来我们得走回家。
2)The astronauts feel as if they are being crushed against the spaceship floor.
宇航员们感到自己似乎被紧压着贴在飞船地板上。

四、as if从句省略 当从句中的主语和主句中的主语一致时,从句的主谓结构可以部分省略或全部省略,使句子更加简练。
例如: 1)He stared at the girl as if(he were/was) seeing her for the first time.
他盯着那姑娘看好像是第一次看到她似的。
2)He fell down as though(he were/was) shot.
他倒下了,好像是中弹了似的。
3)She hurriedly left the room as if(she were /was)angry.
她好像很生气,匆匆走出房间。
4)He was talking all the while excitedly,as if(he were /was talking)to himself.
他好像一直对自己兴奋地说个不停。
我用我宝贵的时间在网上找的,希望对你有帮助,希望我是最佳答案,另外给我加分吧。

as if和as though两者的意义和用法相同,引导的从句中的时态取决于说话者对所谈内容的态度。引出的状语从句谓语用虚拟语气,表示与事实相反;用陈述语气,表示所说情况是事实或实现的可能性较大。

汉译常作"仿佛……似的","好像……似的"。

这两个连词经常用在be,act,appear,behave,fell,look,seem,smell,sound,taste及其他描写行为举止的动词之后,引导一个方式从句。

They completely ignore these facts as if (as though) they never existed.

他们完全忽略了这些事实,就仿佛它不存在似的。(与事实相反,谓语用虚拟语气。)

He looks as if (as though) he had been hit by lightning.

他那样子就像被雷击了似的。(与事实相反,谓语用虚拟语气。)

It looks as if the weather may pick up very soon.

看来天气很快就会好起来。(实现的可能性较大,谓语用陈述语气。)

扩展资料

说明:as if / as though也可以引导一个分词短语、不定式短语、形容词或介词短语,例如:

He stared at me as if seeing me for the first time.

他目不转睛地看着我,就像第一次看见我似的。

He cleared his throat as if to say something.

他清了清嗓子,像要说什么似的。

The waves dashed on the rocks as if in anger.

波涛冲击着岩石,好像很愤怒。



方式状语从句中as if,as though的用法是什么



as if 从句的作用 1. 在look, seem 等系动词后引导表语从句如: She looks as if she were ten years younger. 她看起来好像年轻了十岁 It seems as if our team is going to win. 看来我们队要胜了 2. 引导方式状语从句如: She lovesas if 后面的语法是什么 怎么用的

一、as if 从句的作用
1. 在look, seem 等系动词后引导表语从句。 如:
She looks as if she were ten years younger. 她看起来好像年轻了十岁。
It seems as if our team is going to win. 看来我们队要胜了。 2. 引导方式状语从句。 如:
She loves the boy as if she were his mother. 她爱这男孩,就好像她是他的母亲一样。
The child talked to us as if he were a grownup. 那孩子跟我们谈起话来,像个成年人似的。
二、as if 还可用于省略句中如果as if 引导的从句是“主语+系动词”结构,可省略主语和系动词,这样as if 后就只剩下名词、不定式、形容词(短语)、介词短语或分词。 如:
He acts as if (he was) a fool. 他做事像个傻子。
Tom raised his hands as if (he was going) to say something. 汤姆举起手好像要说什么。
She left the room hurriedly as if (she was)angry. 她匆忙离开房间好像生气的样子。 三、as if 从句的语气及时态
1. as if 从句用陈述语气的情况。 当说话者认为句子所述的是真实的或极有可能发生或存在的事实时。 如:
It sounds as if it is raining. 听起来像是在下雨。
He talks as if he is drunk.
从他谈话的样子来看他是醉了。
2.as if 从句用虚拟语气的情况。 当说话人认为句子所述的是不真实的或极少有可能发生或存在的情况时。从句虚拟语气动词时态的形式如下: (1)如果从句表示与现在事实相反,谓语动词用一般过去时。 如:
You look as if you didn’ t care. 你看上去好像并不在乎。
He talks as if he knew where she was. 他说话的样子,好像他知道她在哪里似的。
(2)从句表示与过去事实相反,谓语动词用“had+过去分词”。 如:
He talks about Rome as if he had been there before. 他说起罗马来好像他以前去过罗马似的。
The girl listened as if she had been turned to stone. 那女孩倾听着,一动也不动,像已经变成了石头似的。
(3)从句表示与将来事实相反,谓语动词用“would/could/might+动词原形”。 如:
He opened his mouth as if he would say something. 他张开嘴好像要说什么。 It looks as if it might snow. 看来好像要下雪了。
(4)as if 后面可以接陈述语气和虚拟语气,如果句子的情况是真实的,那么只要保持时态一致即可,如果后面接的并非真实情况,则要按照虚拟语气规则把句子形式改变(简单说就是事态倒退原则)。 举例:
it seems as if it is raining。外面看起来象是下雨了。(陈述)
it seems as it it were raining。外面看起来好像下雨一样。(虚拟,其实并没有下雨)


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