if虚拟语气的三种时态 虚拟语气考点有哪些(3)
六、虚拟语气在表语从句、同位语从句中的用法：
下列名词后的表语从句或同位语从句，也用"should + 动词原形" 表示虚拟语气：
* demand (要求), desire (请求),requirment (要求)
* advice (劝告), recommendation (建议),suggestion (建议)
* order (命令)
* necessity (必要地), preference (优先)
* proposal (计划), plan (计划), idea (办法)
1.The advice is that we (should 可省略，下同) leave at once.
(名词advice，should + leave) (表示加以劝告)
2. My idea is that we (should) get more people to attend the conference.
(idea, should + get) (表示做出主意)
3. I make a proposal that we (should) hold a meeting next week.
(proposal, should + hold) (表示做出计划)
谈谈虚拟语气(Subjunctive Mood)(六)
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)
谈谈虚拟语气(Subjunctive Mood)(七)
八、虚拟语气在条件从句(Protasis)中的用法：
条件从句有两类：（1）真实条件句；（2）虚拟条件句。如果假设情况有可能发生的，就是"真实条件句"。如：
1. If time permits, we'll go fishing together.
(如果有时间的话，我们就一起去钓鱼。）
如果假设的情况与事实相反，则为"虚拟条件句"。如：
1. If it had rained yesterday, we would have stayed at home.
（如果昨天下雨的话，我们就会留在家里。）
这回我们要谈的就是关于"虚拟条件句"的一些句型。
* 这种句子一般由"从句"（Subordinate Clause)和"主句"(Main Clause)组成。如上
例：
If it had rained yesterday, we would have stayed at home.
"If it had rained yesterday" 就是"从句"；"we would have stayed at home" 则为"主句。
* 无论"从句"或"主句"的谓语都要用虚拟语气。它们所用的动词有三种时态(Tenses)，就是：现在时态、过去时态、将来时态。
* 句型：
8.1 与现在事实相反的假设(事情的发生都在同一时间内):
从句：if + 主语 + 动词的过去式(be 用 were) + ……
主句：主语 + would (should, could , might) + 动词原形 + ……
1.If I were you, I would go with him.
(从句 If I were you, 主句 I would go with him.)
2.If I were you, I should buy it.
(从句用过去式动词were，主句用动词原形 buy)
3.If I had time, I would study French. (如果有时间，我会学习法文。）
（从句用过去式动词had，主句用动词原形 study）
4. If she knew English, she would not ask me for help. (如果她懂英文，她就不必要我帮了。)
(从句用过去式动词knew, 主句用动词原形ask)
注意：如果动作在进行中，主句要用："主语 + would be + 进行式动词 + ……"
5. If they were here, he would be speaking to them now.
(从句用过去式动词were, 主句用 would be speaking)
