传统语法里的虚拟语气以及be型虚拟式虚拟语气 假设意义和虚拟语气 General structure 1. 传统语法里的虚拟语气 真实条件句用于陈述语气，假设的情况可能发生，其中 if 是如果的意思。 时态关系句型：条件从句+主句一般现在时shall/will + 动词原形 e.g., If he comes, he will bring his violin. 真实条件句主句为将来时，从句用一般现在时。 e.g., The volleyball match will be put off if it rains. 现在英语表示“假设意义”(又叫非事实意义)的方式是多种多样的，可以使用动词的过去时形态(一般过去时、过去进行体、过去完成体)、情态助动词的过去时形式或综合使用上述两种手段。 It is time we had a rest. I was wondering if you would let me use your car. How I wish I had gone there with you! 初二下册英语电子课本 速记英语单词方法 人教版高中英语电子课本 I would be there by now if I had started earlier. 2. be-subjunctive  be-型虚拟式 Simple sentences: only one clause Subject + Predicate (phrases)  E.g., The sun was very hot. 1). In certain that-clause: that从句中 用 (should)+ 动词原形表示虚拟语气的结构 It is commonly used in that-clauses to express a command, decision, suggestion etc.   After such verbs动词 as decide, decree, demand, insist, move, order, propose, recommend, request, suggest, vote, etc. (in object clause)  After such adjectives形容词 as advisable, appropriate, desirable, essential, fitting, imperative, important, impossible, necessary, obligatory, proper, etc. (in subject clause)  After such nouns 名词as decision, decree, demand, instruction, order, requirement, resolution, etc. (in appositive and predicative clauses) e.g., He suggests that students (should) learn something practical. 2). In certain adverbial clauses 状语从句( of condition, of concession, and of purpose) e.g., If this rumour (should) be true, we cannot remain here. 3). In certain formulaic expressions 公式化搭配(to express a wish, prayer, curse, etc.) (p. 186) e.g., Far be it from me to …     Suffice it to say that … 3. Were-subjunctive  were-型虚拟式 1). In certain adverbial clauses： Introduced by if, if only, as if, as though, though, etc., to denote an unreal condition or concession. e.g.: If I were you, I should wait till next week. 2). In certain nominal clauses after verbs like wish, would rather, suppose, imagine, etc., to denote a hypothetical situation. e.g.: I wish it were spring all the year round.