英文语法拉杂谈--情态动词

谈谈情态动词(Modal Verbs)(一)

我们常见的英文动词有：及物动词(Transtive Verbs)、不及物动词(Intranstive
Verbs)、助动词(Axiliary Verbs)、联系动词(Link Verbs /Copula)和情态动词(Modal
Verbs)。其他还有：非谓语动词，如：动词不定式、动名词。

这回我们就来谈谈情态动词(Modal Verbs 注意Modal 不是 Model 喔)。
* 情态动词也可称为"情态助动词 (Modal Auxiliaries)"，因为它和基本助动词(be,
do, have)都属于助动词类。
* 情态动词和其他动词连用，可表示说话人的语气。
* 情态动词可表达建议、要求、可能和意愿等。
* 情态动词没有人称和数的变化。
* 常用的情态动词有：can, could, may, might, must, shall, should, will, would
这九大情态动词；其他的还有ought to, need, dare 等。

其实我们这里谈的情态动词，它的特征用法，有许多方面和助动词是一样的（请参阅
《英文语法拉杂谈》助动词）；但为了方便阅读，因此即使相同的部份，这里也同样列
出。

一、情态动词的变化：(情态动词could，动词 to work)

1.1 简单型(Simple)：表示现在或将来的状态

　I could work (动词不可加 to ，如：to work。下同)
　you could work
　he could work
　she could work
　it could work
　we could work
　they could work

1.2 完成式型 (Perfect)：表示过去的状态

　I could have worked (动词是 have + v-ed 过去分词。下同)
　you could have worked
　he could have worked
　she could have worked
　it could have worked
　we could have worked
　they could have worked

1.3 进行式型 (Continuous)：表示现在或将来还在进行的状态

　I could be working (动词是be + v-ing 现在分词。下同)
　you could be working
　he could be working
　she could be working
　it could be working
　we could be working
　they could be working

1.4 完成进行式型 (Perfect Continuous)：表示过去正在进行的状态

　I could ha

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