婆婆嫌弃儿媳丑完整版:虚拟语气在英语中应使用什么时态

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/03 05:05:49
有些虚拟语气用的是一般过去时态,有的是一般现在时,有的又是现在完成时,请问有什么规则吗

虚拟语气用在一般现在时,
从句 IF + S + 一般过去时 , 主句 S +SHOULD/WOULD + V
例子:If I stayed in that school,I would pass the exam.
虚拟语气用在一般过去时,
从句 IF + S + 过去完成时, 主句 S + SHOULD/WOULD have done
例子:If you had been here yesterday, you would have met him.
虚拟语气用在一般将来时,
从句 IF + S + was/were going to do , 主句 S +SHOULD/WOULD + V
例子:if it was going to rain, we wouldn't go on a picnic this Sunday.