谁能简单讲解一下虚拟语态,一定要简单,容易理解

谁能简单讲解一下虚拟语态,一定要简单,容易理解

虚拟语态
一、虚拟语态的几种固定句式
1.I wish.(一定用虚拟)
1）I wish i were you
2)I wish that she were here with me
2、as if./as though 好象 (不一定用虚拟,要看说话的语境``)
1）He speaks as if he were an American.(如果他真的是美国人就不用虚拟了`)
2）He looks as if nothing had happened.
3、if I did/were.I would.
1)If I were you,I wouldn't do that
2)If it were to snow tomorrow,they would not go out
.(用were to 和were的区别是were to 是对将来的虚拟,
用were是对现在的虚拟`详见二、虚拟语态的几种形式```)
二、虚拟语态的几种形式
1、对现在的虚拟：（直接用动词的过去时.）
if I did /were.i would.
2、对将来的虚拟：if ..were to..I would.= if ..did...I would.
(此项与对现在的虚拟相同,但对现在的虚拟不用were to.
要区别对将来的虚拟和对现在的虚拟``一般句子里面都有时间标志``)
(If it were to rain tomorrow,we would not go out.
=If it rained tomorow,we would not go out.)
3、对过去的虚拟 If I had done.I would have done.
(If I had know the answer,I would have told you.)
(至于If ..had been done ...would have done
前面的been只是因为是被动语态```所以要看句子的具体意思````)
另外.固定句型的补充.
要用虚拟语态的句子:
i would rather i could.(I would rather she could not come here)
if noly..(但愿.)
A:I will go to Korean next month.B:If only I could go with you
虚拟语态表示动作或状态不是客观存在的事实,而是说话人的主观愿望,假设,推测,命令,建议,要求等.
o(∩_∩)o...
三种基本结构：
1.与现在事实相反的假设：一般过去时（be用were),主句结构{ should(would)等+动词原型}
例如：If they were here ,they would help you.如果他们在这,
2.与过去事实相反的假设：过去完成时 主句结构：{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.
3.表示对将来不大发生的是的假想.一般过去时,were+不定式,should+动词原形；主句结构：{should(would)+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.