语气英语的动词一般可带有三种不同的语气：陈述语气，祈使语气和虚拟语气。不同的语气用动词的不同形式（有的还借助句法形式）来表示。 语气陈述语气 (The Indicative Mood) 用来陈述一个事实，或提出一个看法，有肯定，否定，疑问或感叹等形式。People get AIDS after having been infected with HIV.Her mother did not know that she had AIDS until after Xiaohua was born.How should we act towards people who have AIDS.What a brave girl! 语气祈使语气 (The Imperative Mood) 用来表示请求，邀请，命令，警告或劝告等。Let me do it.Please keep quiet in the reading room. 虚拟语气• 虚拟语气是一种特殊的动词形式，一是用来表示说话人所说的话不是一个事实，而是一种假设、猜测、怀疑等 ( 在条件从句中或让步状语从句中 ) ；一是表示说话人的愿望、要求、命令、建议等 ( 在宾语从句、表语从句、同位语从句 ) 。虚拟语气的概念 虚拟语气一、在条件从句中 ( 叫虚拟条件句 ) ，表示与事实相反的条件。分三种情况 ( 以 do 为例 ) ：虚拟语气在 在条件从句中表示与事实情况相反条件从句的谓语形式主句的谓语形式表示现在情况过去式 (did)(be 常用 were)Would / could / might / should ( 用于第 1 人称 ) + 动词原形 (do)表示过去情况过去完成式 (had +done)Would / could / might / should +have done表示将来情况① 过去式 (did)(were)②should + do ③were to doWould / could / might / should + do 虚拟语气[ 例句 ]1.If you had come a few minutes earlier, you would have met him. 要是你早来几分钟的话，你就能见到他了。 ( 与过去事实相反 )2. If it were(were to be/should be) sunny tomorrow, I would come to see you. 明天要是天气好的话，我来看你。 ( 与将来事实可能相反 )3. If I were you, I would go now. 假如我是你的话，我现在就走。 ( 与现在事实相反，事实上我不可能是你 )虚拟语气在 在条件从句中 虚拟语气二、省略 if 的条件从句当从句中有 were, had 或 should 时，可省略 if ，而把它们放在句首。• If I were to meet him tomorrow, I should ask him about it. Were I to meet him tomorrow,…•...
