as if虚拟句She treats him as if he were a stranger.她待他如陌生人.为什么这里要用he were 而不用was

as if虚拟句She treats him as if he were a stranger.她待他如陌生人.为什么这里要用he were 而不用was 虚拟语气she treats him as if he were a stranger.为什么要用were而不是用was,为什么不用is?我只想知道为什么? 求助一英语语法知识点she treats me as if i was her daughter.这里为什么用was而不用were,语法知识点是什么,是不是虚拟语气? 改错：She treats me as if i am a stranger1.She treats me as if i am a stranger2.it is essential that he has all the facts 3.A number of work has to be done today是改错题~每句里面有一个错误的地方~是哪里呢？ as if 的虚拟语气? 关于虚拟语气的疑问：虚拟语气有主从句之分,让我很困惑的不含if的虚拟语气..as if/as though+主语+虚拟语气过去式/虚拟语气过去完成时,If only+主语+虚拟语气过去式/虚拟语气过去完成时,什么 as if 作虚拟语气怎么用? 虚拟语气as if 的用法? the document says that a peasent as well as the poor__free of charge if he or she suffers from sarsa;is treated b;are treated c:treats d;was treated 求if、only if 、as if虚拟语气的用法? 用as if,if only,wish各用虚拟语气造两个句 10个词以上! he treats me as if I were a stranger.为什么用were 而不是am 请问if引导的虚拟语气能不能处理成省略主语的非谓语形式?比如（she ignored me as if she hadn't known me)处理成(she ignored me as if not having known me)?) 1.She is ____ is known as a nosy person.选waht不选who,我想问who不能引导表语从句吗?2.If only the company ____ appove the idea.选would不选should,我想问If only后接虚拟语气,看作省略主句的条件句,那么虚拟语气中 关于as if 的虚拟语气as if 虚拟语气中的be 动词一定要用were 用as if和as though造句,注意虚拟语气 as if引导的虚拟句是否遵循时态倒退原则呢?He talks about Rome as if he had been there before如何解释 if如何构成虚拟条件句的?