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大学英语四六级语法试题虚拟语气详解资料 主语从句中的虚拟语气 一、It is +形容词+that结构中的虚拟语气 在形如It is +形容词+that结构中，使用某些表示愿望、建议、请求、命令、可能、适当、较好、迫切、紧近、重要等形容词后的主语从句的谓语也用虚拟语气。其表达形式为should +动词原形或省略should直接用动词原形 常用的形容词： natural , appropriate ,advisable , preferable , better necessary , important , imperative , urgent , essential , vital probable , possible desirable advisable，compulsory，crucial，desirable，essential，imperative，incredible，necessary，possible，strange，urgent。 常用的过去分词: required , demanded , requested , desired suggested , recommended orderd 1. It is necessary that we have a walk now. 2.It was necessary that we make everything ready ahead of time. 3. It is required that nobody smoke here. 4. It is important that every pupil be able to understand therule of school. 5. Its important that we take good care of the patient. 6. It is natural that she should do so. 7.It is essential that these application forms be sent back as early as possible.这些申请表应尽早地寄回，这是很重要的。 | 
