4句话搞定英语最难语法：虚拟语气10大必背句式（10=1+2+3+4）我所说的四句话掌握虚拟语气，指的是“1234,4321；1234,4321”.巧记1. 与下句中suggest用法类似的10个词:1个坚持(insist)，2个命令(order, command)，3个要求(demand , require, request,)4个建议(advise, suggest, propose，recommend)巧记2. 名词性从句中的虚拟语气：在4种从句(主宾表同)抓3种词性（suggest/suggested/suggestion+that）注意2个多义词（suggest，insist）和1个time（It’s high time that sb. should do/ did sth. ）巧记3. 条件句中的虚拟语气：用1种规则（提前一个时态）转换2种条件句（真实→虚拟）来表达3种时间下的非事实（过去,现在,将来）注意4种特例（错综,倒装,含蓄,转化）巧记4. 虚拟语气其他情况：“it”句式 3“愿望”（wish，would rather, if only）2“似乎”（as if/as though）1结构：had planned to do巧记4：虚拟语气的其他情况4“it”句式（这4种句式都是it作形式主语，都可用should do表虚拟语气）① It is/was +10个动词（-ed）+sb.(should) do② It is important, necessary, natural, strange…that+ (should) do③ It is a pity, a shame, no wonder… that+ (should) do④ It is (high/about) time that sb. should do/did sth.(should不可省略）3“愿望”（wish希望 would rather宁愿 if only要是…就好了）时态提前的规则：2“似乎”（as if=as though）似乎的事情与现在或过去事实相反，或似乎将要发生的事没发生，这就是虚拟语气，也是提前一个时态。
1“结构”：had planned to do（本计划做而没有做,与过去事实相反）例句：I had planned to go to your party, but I was too busy then.我本计划去你的聚会的，但是我当时太忙了所以事实上没去）类似的词：meant，intended，wanted, hoped, expected, thought, imagined.。