七、虚拟语气在主语从句中的用法
句型：It is (或was) + 形容词(或过去分词) + that …… +should + 动词原
形……
句子：It is natural that she should do so. (形容词natural, should+动词原
形do)
常用的形容词：
* natural (自然的), appropriate (适当的),advisable (合适的), preferable (更可取的), better (更好的)
* necessary (必须的), important (重要的), imperative (急需的), urgent (急迫的), essential (本质的), vital (必不可少的)
* probable (很可能的), possible (可能的)
* desirable (极好的)
常用的过去分词(Past Participle):
* required (需要的), demanded (要求), requested (被请求的), desired (要求)
* suggested (建议), recommended (推荐)
* orderd (命令)
1. It is necessary that we (should 可省略,下同）have a walk now.
(necessary, should + have) (表示有需要去散步)
2.It was necessary that we (should) make everything ready ahead of time.
(necessary, should + make) (表示有必要事先做好准备)
3. It is required that nobody (should) smoke here.
(required, should + smoke) (表示要求不要在此抽烟)
4. It is important that every pupil (should) be able to understand the
rule of school.
(important, should + be) (表示重要的是学生都能了解校规)
5. It\'s important that we (should) take good care of the patient.
(important, should + take) (表示重要的是照顾好病人)
