虚拟语气的定义.举一些例子,还有一些虚拟语气标志的词或短语.具有代表性的,谢谢!

虚拟语气的定义
虚拟语气用来表示说话人所说的不是一个事实,而是一种愿望、假设、怀疑、建议猜测、可能或纯粹的空想.如：If I were you,I should gou.如果我是你,我就去.前半部分是条件从句,后半部分是结果主句.其动词形式i要有所变化.
与现在事实相反 条件从句 If I (we,you,he,they)+动词be的过去式用were
结果主句 I (we)should+动词原形
He(youthey)would+动词原形
例如：If I were you,I should go.如果我是你,我会去（我就会去）
与过去事实相反 条件从句 If I (we,you,he,they)+ had+过去分词
结果主句 I (we) should+ have+过去分词
He (youthey) would+ have+过去分词
例如：If you had come a few minutes earlier,you would have met him.
如果你早来几分钟的话,你就见到他了.
与将来事实可能相反 条件从句 If I (we,you,he,they)+ +should+动词原形
结果主句 (we)should+动词原形
He(youthey)would+动词原形
例如：if it should rain tomorrow,he would not go with you.
如果明天下雨,他就不和你一起去了.