if虚拟语气的三种时态 虚拟语气考点有哪些(3)

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  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)

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