在非真实条件句中虚拟语气，虚拟语气在条件句中的用法

知识点1:在非真实条件句中虚拟语气

虚拟语气用于非真实条件句中有下列几种情形：
1. 表示与现在事实相反的虚拟语气，非真实条件句中的谓语动词用“过去式(be动词一般用were)”，而主句的谓语动词用“would / should / could / might + 动词原形”。如：[1]should,could,相关知识点

常见的情态动词有：can (could) ,may (might), must ,shall (should), will (would), dare (dared) , need等,另外,have to、had better也当作情态动词使用。情态动词后面必须加动词的原形。 查看详情>>

①If I were you I would stay here. 如果我是你，我就呆在这儿。
②We would go with you if we had time. 如果我们有时间，会和你一起去的。[2]go with,would,相关知识点

like作为"喜欢"讲时，可以接动名词也可以接不定式，但接动名词时多表达一种习惯性动作。而接不定式则侧重于表达一次性、特殊性的动作。 但要注意的是like 与would连用时则一定要接不定式，如：Would you like to go with me? 再有一点要注意的是，like作为介词"像"讲时，只能用分词作其宾语。 ［误］ I like to swim very muc查看详情>>

2. 表示与过去事实相反的虚拟语气，非真实条件句中的谓语动词用“过去完成时”，而主句的谓语动词用“would / should / could / might + have + 过去分词”。如：[3]should,could,might,相关知识点

表推测的 can / may / could / might / should / must表推测的 can / may / could / might / should / must1. 从所用句型来看can用于否定句和疑问句，may用于肯定句和否定式，两者均可用于否定句，但是含义不同(cannot=不可能，may not=可能不)；could, might 和 should查看详情>>

①If he had come here yesterday, I should have told him about it. 如果他昨天到这里来，我早就告诉他这件事了。[4]should,have,相关知识点

should + have + 过去分词如果是否定式，则表示本来不该发生的情况却发生了。如：You shouldn’t have opened her letter. 你是不应该拆她的信的。She shouldn’t have stood in a queue. She should have got tickets from the machine. 她本来就不该去排队，她应查看详情>>

②If I had seen you yesterday, I would have asked you about it. 如果我昨天看到你，我就会问你这件事。[5]would,have,相关知识点

If I had V-ed, I would have ... 句型结构分析语法讲解：句子成分、什么句型句法，怎么用什么意思 I might have been incredulous had I not been accustomed to such responses. 若非我已经习惯了这样的回答，我可能不敢轻易相信。 Had he not apolo查看详情>>

3. 表示与将来事实相反的虚拟语气，非真实条件句中的谓语动词用“过去式或should或were to + 动词原形”，而主句的谓语动词用“would / should / could / might + 动词原形”。如：[6]might,could,相关知识点

知识点1:can, could, may, might, must 表示推测的用法The road is wet. It must have rained last night.地是湿的，昨天晚上一定下雨了。4）情态动词+动词的现在完成进行时。表示对过去正在发生事情的推测。Your mother must have been looking for you.你妈妈一定一直在找你查看详情>>

①If it should rain this afternoon, the basketball match would be put off. 要是今天下午下雨，篮球比赛就延期举行。[7]should,would,相关知识点

should/would + V ... 句型结构分析语法讲解：句子成分、什么句型句法，怎么用什么意思结构︰主词＋should（would，may）＋原形动词…。说明︰should 是 shall 的过去式，当“将要”解释，通常用于是第一人称 I 或 we；should又当“应该”解释，表示义务或责任，常用于指“现在或未来”的事情，可用任何人称。 would 是 will 的过查看详情>>