文档介绍：关于虚拟语气PPT
现在学****的是第1页，共55页
虚拟语气
虚拟语气：表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。如：
①If I were a bird, I could fly in the asisted that everybody obey the rules.
现在学****的是第9页，共55页
主语从句中的虚拟语气
一、“It is (was)+形容词（或过去分词）+that……”结构中的虚拟语气
在形如“It is (was)+形容词（或过去分词）+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。其表达形式为直接用动词原形.
常用的形容词：* natural (自然的), advisable (合适的), preferable (更可取的), better (更好的)* necessary (必须的), important (重要的), 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)advisable（合理的），desirable（理想的），strange（奇怪的）。
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)* ordered (命令)
现在学****的是第10页，共55页
1. It is necessary that we have a walk now.
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 the rule of school.
5. It's important that we take good care of the patient.
6. It is natural that she should do so.
is essential that these application forms be sent back as early as possible．
现在学****的是第11页，共55页
注：在上述所列形容词后面用that引出的宾语从句中，谓语动词也要用虚拟语气。
I don't think it advisable that Tom be assigned to the job since he has no experience．汤姆缺乏经验，指派他做这项工作我认为是不恰当的。
二、在It is ＋名词＋that…的主语从句中的虚拟语气
在It is ＋名词＋that的主语从句中，常用虚拟语气，表示建议、命令、请求、道歉、怀疑、惊奇等。这类名词
有：advice ，decision ，demand ，idea，order，pity ，preference ，proposal，recommendation ，
requirement，shame，suggestion，surprise，wish，wonder等。
⑴ It is my proposal that he be sent to study further abroad．我建议派他去国外进一步学****br/>现在学****的是第12页，共55页
虚拟语气用在表语从句或同位语从句中
当某些表示建议、请求、命令等主观意向的名词作主语时，其后的表语从句或同位语从句需用虚拟语气，其表达形式为直接用动词原形。这类名词常见的有：demand , requirement ,advice , recommendation (建议),suggestion ,order ,necessity , preference (优先)proposal (计划), plan， idea 等。
We are all for your proposal that the discussion be put off．
The suggestion that the mayor present the prizes was accepted by everyone．
The advice is that we