英语高手进

虚拟语气在as if/as though、even if/even though等引导的表语从句或状语从句中，

如果从句表示的动作发生在过去，用过去完成时；

指现在状况，则用一般过去时；

指将来状况则用过去将来时。

如：
He did it as if he were an expert.

Even if she were here, she could not solve the problem.

it seems as if 那看上去好象....常用虚拟语气

as if (= as though) 意思是“好像……，仿佛……”，是个连词，引导方式状语从句。例如：

He makes it seem as if it were one of the best meals he has ever had.

关于as if 的用法比较复杂一些，请注意以下几个问题：

1. as if 引导的从句经常用虚拟语气。从上面的句子可以看出，主句都是现在时态，as if从句都是过去时态，这说明as if 从句表示的意思与事实不符或者相反。例如：

He walks as if he were drunk.

My neighbor treats the child as if he were their own son.

2. 但是，如果句子表达的意思与事实并没有什么不符，那么就不使用虚拟语气。例如：

He heard a noise, as if someone was breathing.

It looks as if it is going to rain.

3. as if 经常和look, seem 连用。例如：

She looks as if she is (were) ill, because her face is pale.

It seemed as if there was a fight between the two sides.

4. as if 从句中的主语如果和主句主语相同，而且谓语动词有be, 则从句主语和谓语经常省略。例如：

She stood at the gate as if (she was) waiting for someone.

The teacher shouted at the boy as if (he was) angry.

as if 后面接从句时，从句若表示与现在/过去的事实相反，用虚拟语气
若表示客观事实，则采用相应时态

这句话是真是条件句 从意义上看并没有虚拟

我觉的用is 说起来比较顺。老外都这样说。

seem，意思是好像。seem暗示有一定根据，且往往接近于事实。所以当seem用于一般现在时的时候，它往往是在陈述一个事实，就相当于在陈述一件事情，所引这时用的是一般现在时，而不是虚拟语气。
同样的例子还有：It seems as if it is going to rain this evening.今晚上看起来似乎要下雨。这也是在陈述一件事情，所以不用虚拟语气。