虚拟句中（if虚拟条件句除外） ,是不是was都得变成were?

条件状语从句
连接词主要有 if, unless, as/so long as, on condition that 等.if 引导的条件句有真实条件句和非真实条件句两种.非真实条件句已在虚拟语气中阐述.
unless = if not.　 例如：
Let's go out for a walk unless you are too tired. 如果不太累,我们去散散步.
If you are not too tied, let's go out for a walk.
You will be late ___ you leave immediately.　
A. unless　 B. until　 C. if　　D. or
答案A.句意：除非你立即走,否则你就回迟到的.可转化为 If you dong leave immediately, you will be late.B、D句意不对,or表转折,句子如为 You leave immediately or you will be late.
虚拟语气
1）虚拟语气用来表示说话人的主观愿望或假想,所说的是一个条件,不一定是事实,或与事实相反.虚拟语气在条件句中应用比较多.
2）条件句可分为两类,一类为真实条件句,一类为非真实条件句.非真实条件句表示的是假设的或实际可能性不大的情况,故采用虚拟语气.
真实条件句用于陈述语气,假设的情况有可能发生.
一般现在时
shall/will + 动词原形
祈使句 情态动词一般现在时
例如：If he comes, he will bring his violin. 如果他来,会带小提琴来的.
The volleyball match will be put off if it ___.　
A.　will rain　 B. rains　 C. rained　 D. is rained
答案B.真实条件句主句为将来时,从句用一般现在时.
注意：
1）在真实条件句中,主句不能用be going to表示将来,该用shall, will.
（错） If you leave now, you are never going to regret it.
（对） If you leave now, you will never regret it.
2）表示真理时,主句谓语动词不用shall （will） +动词原形,而直接用一般现在时的动词形式.
非真实条件句
1）虚拟语气可以表示过去,现在和将来的情况,时态的基本特点是时态往后推移.
a. 与现在事实相反的假设
一般过去时（be用were）should（would）等 +动词原形
例如：If they were here, they would help you. 如果他们在这儿,会帮助你的.
含义：They are not here, they can’t help you.
b. 与过去事实相反的假设
过去完成时
should（would）等+ have+ 过去分词
例如：If he had come yesterday, I should / would have told him about it.如果他昨天来的话,我会把这件事告诉他的.
含义：He did not come yesterday, so I did not tell him about it.
c. 表示对将来不大可能发生的事情的假想
一般过去时
should/would等 + 动词原形
were+ 不定式
should+ 动词原形
例如：If you succeeded, everything would be all right. 如果你将来成功了,一切都会好的.
If you should succeed, everything would be all right.
If you were to succeed, everything would be all right.
含义：You are not likely to succeed, everything will be what it is now.

如果迈克尔在期末考试的语法部分没犯错误的话,他将获得第一名的.

老师基本没错,题目也没有错.
用地道标准的BrE.来评判,此句不算错,也得挨骂（不地道/不规范/不标准等）.
但用AmE来看,这个句子好的很.
明白了?

牛津教材对虚拟语气的讲解有了更新,从句中也可以用 主句所能用的结构.
一些以前不存在的结构：
I wish I could have won the game.
If I could have won the game,I would have been very happy.
语言在发展变化,所以你的例句并不奇怪.
你可以去看看高中牛津教材,好像是5模块还是6模块!语法部分,虚拟语气的讲解!

if+条件,主+would/might/should+.这就是虚拟句的格式,主要是看后面

were i

as if 一般来说是遵循倒退原则的.但请具体结合虚拟时态部分来学习.
楼主是不明白为什么用had been吗?那你觉得应该用什么?
如果看不出来我们可以先还原.比如它是一个一般的句子.
He talks about Rome,because he has been there before.
这句应该没问题吧,表示以前去过.那现在的谈话其实是对过去事件的虚拟,相应的就是had been.
这也是高中英语常考的题型：主句和从句时态不一致.要根据说话的时间所指和内容来判断.并不是一个句子只能有一种时态.
as if 句型最重要的是掌握如：he speaks french,as if he were a frenchman.这类的句型.

答案是：B.
完整的句子是：Mr.Green must have failed to receive my letter,otherwise he would have replied before now.
实际上,这句话分为两部分,一是前一句,这句和虚拟语气没有关系,是表示说话者带有较为肯定的推测,是推测但较为肯定,所以句中有must来表达这种情形；第二句才是虚拟语气语句,otherwise是用于虚拟语气的付词,意思是“否则”或“如果不是…,那么…”,otherwise he would have replied before now = if he had not received my letter,he would have replied before now.所以虚拟语气是仅仅发生在第二句之内的.

这属于虚拟语气的范畴,一般都用were,特殊表述去过!
看你这样子,记着这些就够了,像那些特殊的表述以后会慢慢接触到的!

虚拟语气都要用were的,不管前面是he还是they,这是固定的用法.

he'd 是 he would的缩写. 是虚拟句. 这个应该是口语,口语不需要那么严格的遵守语法规则的.