it looks as if it is going to rain 这里的用is 用were 的话就错的吧，根本就没有

你好

it looks as if it is going to rain 这里得用is

因为be动词修饰的是前面的主语it,而it是个单数形态的主语，所以只能用is.

看be动词用什么需要看前面的主语，一般是it is/was+...,
用were或are的句型一般是there/they/their are/were...

希望有帮到你，谢谢！

望采纳！

楼下的好像不知道虚拟语气
这句话虚不虚拟都行

翻译：
看起来要下雨了

下的可能性小，就虚拟
it looks as if it is going to rain和were的
都对

关于as if 虚拟语气问题在说明一下吧。

与现在事实相反，用were
People treat me as if I were a child.

与过去相反，用had done
People treated me as if I had been a child.

看完例句，应该更清晰了。
有疑问吗

were是are的过去式 主语是it 所以谓语单数 有那样的句子 be going to 此处表示即将发生的例如
you are going to adopt my answer as the best。
或者
when you called them，they were going to get out。
LS正解

用is才对！