as if 用法小结(课堂PPT)

asif虚拟语⽓⽤法常见⽤法归纳总结以as if (as though)引导的⽅式状语从句或表语从句，有时⽤虚拟语⽓，若表⽰与现在事实相反，谓语动词⽤⼀般过去时；若表⽰与过去事实相反，⽤过去完成时；表⽰将来的可能性不⼤，⽤would (might, could)+动词原形，如：He acts as if he knew me.他显得认识我似的。

as if虚拟语⽓⽤法(1)从句所表⽰的内容若为事实或可能为事实，也可⽤陈述语⽓：It looks as if we’ll be late.我们似乎要迟到了。

This meat tastes as if it has already gone bad.这⾁吃起来似乎已经坏了。

在现代英语中，有时即使从句内容不是事实，也可能⽤陈述语⽓：I feel as if [as though] I’m floating on air.他感到好像漂浮在空中。

The stuffed dog barked as if it is [were, was] a real one.玩具狗叫起来像真狗。

(2)注意It isn’t as if…的翻译：It isn’t as if he were poor.他不像穷的样⼦(或他⼜不穷)。

It isn’t as if you were going away for good.⼜不是你离开不回来了。

什么是虚拟语⽓在表⽰假想的虚假的、与事实相反的或难以实现的情况时⽤虚拟语⽓，表⽰主观愿望或某种强烈情感时，也⽤虚拟语⽓。

即当⼀个⼈说话时欲强调其所说的话是基于⾃⼰的主观想法，愿望，假想，猜测，怀疑或建议，⽽不是根据客观实际，就⽤虚拟语⽓。

主要是英语语法的⼀种表达。

as if 用法归纳1． as if 从句的作用as if一般可由as though来代替。

引导表语从句，可在look, seem等系动词后。

如：He looked as if / though he was ill. 他看起来好像生病了。

It seems as if it is going to rain.看来好像要下雨了。

引导方式状语从句。

如：I remember the whole thing as if / though it happened yesterday.The child talked to us as if he were a grown-up. 那个小孩跟我们讲话就像个大人一样。

2． as if 从句的语气及时态①as if从句用述语气。

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，It sounds as if it is raining. 听起来像在下雨。

He talks as if he is drunk. 从他说话的样子来看他是醉了。

②as if从句用虚拟语气。

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，表示与现在事实相反，谓语动词用一般过去式。

如：You look as if you didn’t care. 你看上去好像并不在乎。

When a pencil is partly in a glass of water, it looks as if it were broken．表示与过去或与谈话时间为止发生的事实相反，谓语动词用“had +过去分词”。

如：He talked about the Great Wall as if he had been there before.说起长城来好像他以前去过那里。

The girl listened as if she had been turned to stone.女孩听着，一动也不动，像已经变成了石头。

as if虚拟语气用法总结虚拟语气是英语中一种常见的语法现象，用于表示与事实相反或假设的情况。

其中，as if虚拟语气是一种常用的表达方式。

在本文中，我将总结as if虚拟语气的用法及相关注意事项。

首先，as if虚拟语气常用于表示与现实相反的情况。

它可以用来描述假设、愿望、建议或命令等。

在使用as if虚拟语气时，我们常使用动词的过去式形式，与"as if"或"as though"连用，构成"as if/though + 过去式"的句式结构。

例如：1. She looks as if she were a movie star.（她看起来好像是个电影明星。

）2. He speaks as if he knew everything.（他说话好像他什么都知道。

）3. It's as if the sun disappeared.（好像太阳消失了。

）在以上例句中，as if虚拟语气用于表示与现实相反的情况。

实际上，她并不是一位电影明星，他并不是什么都知道，太阳也并没有消失。

这些句子中的as if虚拟语气让我们感受到一种与事实相反的情况。

此外，as if虚拟语气也可以用于表示推测或假设的情况。

在这种情况下，as if 虚拟语气常用于描述对过去的猜测或对现在的推测。

例如：1. It looks as if it had rained earlier.（看起来好像之前下过雨。

）2. He talks about the movie as if he had watched it.（他说起那部电影好像他看过。

）3. She acts as if she were the boss.（她的行为好像她是老板。

）这些句子中的as if虚拟语气用于描述对过去或现在的推测。

虽然我们无法确定是否确实下过雨、他是否真的看过那部电影或她是否真的是老板，但使用as if虚拟语气可以让我们对这些情况进行猜测或推测。

as if 用法归纳1．as if 从句的作用?as if一般可由as though来代替。

可在look, seem等系动词后引导表语从句。

如：He looked as if / though he was ill. 他看起来好像生病了。

It seems as if it is going to rain.看来好像要下雨了。

它还可引导方式状语从句。

如：I remember the whole thing as if / though it happened yesterday.我记得整个事情，就好像它是发生在昨天一样。

The child talked to us as if he were a grown?鄄up.那个小孩跟我们讲话就像个大人一样。

2．as if 从句的语气及时态①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，as if从句用陈述语气。

如：It sounds as if it is raining.听起来像在下雨。

He talks as if he is drunk.从他说话的样子来看他是醉了。

②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，as if从句用虚拟语气。

表示与现在事实相反，谓语动词用一般过去式。

如：You look as if you didn’t care.你看上去好像并不在乎。

He talked as if he knew what had happened.?他说话的样子，好像他知道发生了什么事情。

表示与过去或与谈话时间为止发生的事实相反，谓语动词用“had +过去分词”。

如：He talked about the Great Wall as if he had been there before.他说起长城来好像他以前去过那里。

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。

as if 用法归纳1．as if 从句的作用 as if一般可由as though来代替。

引导表语从句，可在look, seem等系动词后。

如：He looked as if / though he was ill. 他看起来好像生病了。

It seems as if it is going to rain.看来好像要下雨了。

引导方式状语从句。

如：I remember the whole thing as if / though it happened yesterday. The child talked to us as if he were a grown-up. 那个小孩跟我们讲话就像个大人一样。

2．as if 从句的语气及时态①as if从句用陈述语气。

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，It sounds as if it is raining. 听起来像在下雨。

He talks as if he is drunk. 从他说话的样子来看他是醉了。

②as if从句用虚拟语气。

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，表示与现在事实相反，谓语动词用一般过去式。

如：You look as if you didn’t care. 你看上去好像并不在乎。

When a pencil is partly in a glass of water, it looks as if it were broken．表示与过去或与谈话时间为止发生的事实相反，谓语动词用“had +过去分词”。

如：He talked about the Great Wall as if he had been there before.说起长城来好像他以前去过那里。

The girl listened as if she had been turned to stone.女孩听着，一动也不动，像已经变成了石头。

as if 用法归纳1．as if 从句的作用as if一般可由as though来代替。

可在look，seem等系动词后引导表语从句。

如：He looked as if / though he was ill。

他看起来好像生病了。

It seems as if it is going to rain。

看来好像要下雨了。

它还可引导方式状语从句。

如:I remember the whole thing as if / though it happened yesterday。

我记得整个事情，就好像它是发生在昨天一样。

The child talked to us as if he were a grown?鄄up.那个小孩跟我们讲话就像个大人一样。

2．as if 从句的语气及时态①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, as if从句用陈述语气。

如：It sounds as if it is raining.听起来像在下雨。

He talks as if he is drunk.从他说话的样子来看他是醉了。

②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, as if从句用虚拟语气。

表示与现在事实相反,谓语动词用一般过去式.如:You look as if you didn't care.你看上去好像并不在乎.He talked as if he knew what had happened。

他说话的样子，好像他知道发生了什么事情。

表示与过去或与谈话时间为止发生的事实相反,谓语动词用“had +过去分词”.如：He talked about the Great Wall as if he had been there before。

他说起长城来好像他以前去过那里。

The girl listened as if she had been turned to stone。