灵鹊做题网虚拟语气 主将从现虚拟语气 If it were fine tomorrow,I would go shopping.主
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虚拟语气 主将从现
虚拟语气 If it were fine tomorrow,I would go shopping.
主将从现 If it rains tomorrow,we will stay at home
有什么区别在什么情景下使用
虚拟语气 If it were fine tomorrow,I would go shopping.
主将从现 If it rains tomorrow,we will stay at home
有什么区别在什么情景下使用
虚拟语气用来表示说话人的主观愿望或假想,而不表示客观存在的事实,所说的是一个条件,不一定是事实,或与事实相反.虚拟语气通过谓语动词的特殊形式来表示,】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,
含义：They are not here,they can’t help you.
b.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.
c.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
在 if 引导的条件状语从句中,
a.如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态.
如：We can walk there if we can't find a bus ;If it rains tomorrow ,we will not go to the zoo.
b.如果 if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态.如：If bears are in danger ,they attack people.
c.在 if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若 if 条件句放句首,从句后面要加逗号,和主句隔开,还要注意前后时态一致原则.
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,
含义：They are not here,they can’t help you.
b.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.
c.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
在 if 引导的条件状语从句中,
a.如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态.
如：We can walk there if we can't find a bus ;If it rains tomorrow ,we will not go to the zoo.
b.如果 if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态.如：If bears are in danger ,they attack people.
c.在 if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若 if 条件句放句首,从句后面要加逗号,和主句隔开,还要注意前后时态一致原则.
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