if引导的虚拟语气条件句 ppt课件

If虚拟条件句
主句
与将来事实可 能相反的假设
1. If + 主语 + 动词过去式 2. If + 主语 + were to + 动
词原形 3. If + 主语 + should + 动
词原形
主语 + would(could/shoul d/might) + 动词原 形
If it rained tomorrow, I wouldn’t attend the party.
时）
主语 +would(should /might/could)+h ave done
If he had got up earlier, he could have caught the train.
二.与现在事实相反
If引导的虚拟条件句
主句
与现在事实 相反的假设
If + 主语 + 动词过去 If + 主语 +
在就能快速完成这份工作了（从句说明过去，主句说明现
与在过）去。相反，以前没有刻苦学习
与现在事实相反，现在没有快速 完成
2）If I were you, I would have gone to her birthday party yesterday.如果我是你，我就去参加她昨天的生日 聚会了（从句说明现在，主句说明过去）。
♦ 要根据动作发生的时间选择恰当的动词形式。
特例
2.省略If的条件从句
如果条件句中有were/had（助动词）/should时，可使 用倒装句结构——省略If，把were/had（助动词） /should放句首。如果条件句是否定句时，not应置于主 语后，不能与were/had（助动词）/should等缩略成 weren’t/hadn’t/shouldn’t.
If it ___ tomorrow, I would not attend the party. A. rained B. rains C. had rained D. were to rain 3. I would have gone to the meeting if I __time. A. had had B. have had C. had D. would have had
Practice
1. If you had told me in advance, I ____ him at the airport. A. would meet B. would have met C. would had met D. should meet
Practice
1. If you had told me in advance, I ____ him at the airport. A. would meet B. would have met C. would had met D. should meet
subjunctive mood about “if”. 4.Practices.
虚拟语气
概念： 1.表示说话人所说的话不是一个事实， 而是一个假设、怀疑、猜测等（常见于 条件状语从句或让步状语从句）。 2.表示说话人的愿望、建议、要求、命 令等（常见于名次性从句）。 简单来说：不是事实或不大可能发生的 事情，用虚拟语气来表述。
If引导的虚拟条件句
注意：要区分if引导的真实条件句和if 引导的虚拟条件句
表示虚拟的，几乎无法实现的时候，采 用虚拟语气。
If引导的虚拟条件句
TYPES:
特殊：错综时间 / 倒装句省略IF等
一.与过去事实相反
If引导的虚拟条件句
主句
Hale Waihona Puke Baidu
If + 主语 + had + 动词 与过去事实 的过去分词 相反的假设 （即：If+动词过去完成
2.If it ___ tomorrow, I would not attend the party. A. rained B. rains C. had rained D. were to rain 3. I would have gone to the meeting if I __time. A. had had B. have had C. had D. would have had
If it were to rain tomorrow, I wouldn’t attend the party.
特例
1. 错综时间条件句
定义：主句和从句动作发生的时间不同
例1） If they had studied hard, they could finish the
work in a very short time.如果他们当时刻苦学习，现
式（be动词一般用 would(could/sh
were）
ould/might) +
动词原形
即：If + 一般过去时
If I were you, I would buy a red skirt. If I had a million dollars, I would donate
三.与将来事实可能相反
例：Had I seen him then, I would have been very happy.
=If I had seen him then, I would have been very happy.
Should I have time, I would go with you. =If I should have time, I would go with you.
虚拟语气 The Subjunctive Mood
虚拟语气
Learning Goals： 1. Knowing what the subjunctive
mood refers to. 2.Knowing the difference forms of
the subjunctive forms. 3.Master the structure of the
If it ___ tomorrow, I would not attend the party. A. rained B. rains C. had rained D. were to rain 3. I would have gone to the meeting if I __time. A. had had B. have had C. had D. would have had