作业帮非真实条件句
来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/06/10 23:54:52
老师，能给我讲一下过去非真实条件句吗？
解题思路： 要结合例句学习英语语法。
解题过程：
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
条件从句 主句 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. 表示对将来不大可能发生的事情的假想
条件从句 主句 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.
c. 与过去事实相反的假设
条件从句 主句 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.
学习进步！
最终答案：略
解题过程：
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
条件从句 主句 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. 表示对将来不大可能发生的事情的假想
条件从句 主句 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.
c. 与过去事实相反的假设
条件从句 主句 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.
学习进步！
最终答案：略