大学英语六级语法中关于虚拟语气要点
<p> 1. 主语从句中的虚拟语气</p><p> 主语从句中的虚拟语气主要取决于某些形容词和过去分词，用来表示建议、命令、要求、惊异和失望等。其形式为：(<span word="should">should</span>)+ 动词原形。</p><p> 常这样用的形容词有：</p><p> <span word="appropriate">appropriate</span> 适当的 <span word="advisable">advisable</span> 适当的，合理的</p><p> <span word="better">better</span> 较好的 <span word="desirable">desirable</span> 理想的</p><p> <span word="essential">essential</span> 精华的 <span word="imperative">imperative</span> 迫切的</p><p> <span word="important">important</span> 重要的 <span word="insistent">insistent</span> 坚持的</p><p> <span word="natural">natural</span> 自然的 <span word="necessary">necessary</span> 必要的</p><p> <span word="preferable">preferable</span> 优越的，较好的 <span word="strange">strange</span> 奇怪的</p><p> <span word="urgent">urgent</span> 紧迫的 <span word="vital">vital</span> 极其重要的</p><p> 过去分词有：</p><p> <span word="desired">desired</span>， <span word="demanded">demanded</span>， <span word="ordered">ordered</span>， <span word="requested">requested</span>， <span word="suggested">suggested</span>， <span word="recommended">recommended</span>， <span word="required">required</span> 等。</p><p> 例如：</p><p> <span word="It">It</span> <span word="is">is</span> <span word="essential">essential</span> <span word="that">that</span> <span word="you">you</span> (<span word="should">should</span>) <span word="win">win</span> <span word="the">the</span> <span word="voters">voters</span> <span word="hearts">hearts</span>.</p><p> 赢得选民的心是绝对必要的。</p><p> <span word="It">It</span> <span word="was">was</span> <span word="suggested">suggested</span> <span word="that">that</span> <span word="he">he</span> (<span word="should">should</span>) <span word="join">join</span> <span word="the">the</span> <span word="club">club</span> <span word="activities">activities</span>.</p><p> 有人提议他应该参加俱乐部的活动。</p><p> 2. 表语从句和同位语从句中的虚拟语气</p><p> 在表示建议、命令、主张、目的和愿望等名词后面的表语从句和同位语从句中谓语动词要求使用虚拟语气。其形式为：(<span word="should">should</span>)+ 动词原形。</p>
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