I knocked at the door as if i knocked at my own.的时态AS IF 从句叫什么从句来着?主句过去时,AS IF也用过去时?是必须的吗?如果主句将来时,那从句呢

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I knocked at the door as if i knocked at my own.的时态AS IF 从句叫什么从句来着?主句过去时,AS IF也用过去时?是必须的吗?如果主句将来时,那从句呢
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I knocked at the door as if i knocked at my own.的时态AS IF 从句叫什么从句来着?主句过去时,AS IF也用过去时?是必须的吗?如果主句将来时,那从句呢
I knocked at the door as if i knocked at my own.的时态
AS IF 从句叫什么从句来着?主句过去时,AS IF也用过去时?是必须的吗?如果主句将来时,那从句呢

I knocked at the door as if i knocked at my own.的时态AS IF 从句叫什么从句来着?主句过去时,AS IF也用过去时?是必须的吗?如果主句将来时,那从句呢
as if 的用法
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.
希望能对你有用.

as if虚拟语气吧
as if后接句子,如句子反映的不是真实情况,则应用虚拟语气,句子的谓语动词常用一般过去时(如果主句与从句中的谓语动词所表达的动作同时发生或as if从句中的动词表示状态时)或过去完成时(如果从句中的谓语动词所表示的动作发生在主句谓语动作之前),例 He talked as if he had known the secret. 他说起话来就象他已经知道了那个秘密(事...

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as if虚拟语气吧
as if后接句子,如句子反映的不是真实情况,则应用虚拟语气,句子的谓语动词常用一般过去时(如果主句与从句中的谓语动词所表达的动作同时发生或as if从句中的动词表示状态时)或过去完成时(如果从句中的谓语动词所表示的动作发生在主句谓语动作之前),例 He talked as if he had known the secret. 他说起话来就象他已经知道了那个秘密(事实是:他并不知道那个秘密)。
主句将来时看情况吧
I will love you deeply as if you had never hurt me.
I will love you deeply as if you were the only woman in the world.

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条件状语从句~~~
看具体状况了。这个是knocked 是过去式,而as if 意思”就好像“,介于当时I knocked at the door是过去的动作,那么假设的这个knocked at my own 也是过去式的。
我自己理解的,不很专业,参考一下

as if(好像)在此引导方式状语从句。表较大的真实性,主从句时态常一样。此句就是这样。
也常用虚拟,主从句时态如下,
主句现在+从句过去
主句过去+从句had+过去分词
主句将来+从句wound(might)+动词原形
as if 也引导表语从句