助动词用法总结
<p>&<span word="nbsp">nbsp</span>;</p><p> 助动词是协助主要动词构成谓语动词词组的词， 助动词是语法功能词，自身没有词义，不可单独使用，助动词用法有一下几种：</p><p> 1)<span word="have">have</span> +过去分词，构成完成时态，例如：</p><p> <span word="He">He</span> <span word="has">has</span> <span word="left">left</span> <span word="for">for</span> <span word="London">London</span>. 他已去了伦敦。</p><p> <span word="By">By</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="last">last</span> <span word="month">month</span>, <span word="they">they</span> <span word="had">had</span> <span word="finished">finished</span> <span word="half">half</span> <span word="of">of</span> <span word="their">their</span> <span word="work">work</span>.</p><p> 上月末为止，他们已经完成工作的一半。</p><p> 2)<span word="have">have</span> + <span word="been">been</span> +现在分词，构成完成进行时，例如：</p><p> <span word="I">I</span> <span word="have">have</span> <span word="been">been</span> <span word="studying">studying</span> <span word="English">English</span> <span word="for">for</span> <span word="ten">ten</span> <span word="years">years</span>.</p><p> 我一直在学英语，已达十年之久。</p><p> 3)<span word="have">have</span>+<span word="been">been</span> +过去分词，构成完成式被动语态，例如：</p><p> <span word="English">English</span> <span word="has">has</span> <span word="been">been</span> <span word="taught">taught</span> <span word="in">in</span> <span word="China">China</span> <span word="for">for</span> <span word="many">many</span> <span word="years">years</span>.</p><p> 中国教英语已经多年。</p><p> 助动词<span word="be">be</span>的用法</p><p> 1) <span word="be">be</span> +现在分词，构成进行时态，例如：</p><p> <span word="They">They</span> <span word="are">are</span> <span word="having">having</span> <span word="a">a</span> <span word="meeting">meeting</span>. 他们正在开会。</p><p> <span word="English">English</span> <span word="is">is</span> <span word="becoming">becoming</span> <span word="more">more</span> <span word="and">and</span> <span word="more">more</span> <span word="important">important</span>. 英语现在越来越重要。</p><p> 2) <span word="be">be</span> + 过去分词，构成被动语态，例如：</p><p> <span word="The">The</span> <span word="window">window</span> <span word="was">was</span> <span word="broken">broken</span> <span word="by">by</span> <span word="Tom">Tom</span>.. 窗户是汤姆打碎的。</p><p> <span word="English">English</span> <span word="is">is</span> <span word="taught">taught</span> <span word="throughout">throughout</span> <span word="the">the</span> <span word="world">world</span>. 世界各地都教英语。</p>
页:
[1]