英语：Unit3《Understanding each other》课件（译林牛津版选修6）

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1.英语动词有三种语气， 陈述语气，祈使语气和虚拟语气。
2. 定义：用来表示说的话不是事实，或者是不可能发生的情况，而是一种愿望，建议，假设的语气叫虚拟语气。
一 （ 1）与现在事实相反的条件句
If …were/was/did …, 主句+would/could/might/should do
If I were you, I should/would go at once.
要是我有自己的车，我该多福。
If I had a car of my own, I should be very happy.
（2）与过去事实相反的条件句
If…过去完成时…, 主句+ would/could / might/should have done
If you had been there last night, nothing would have happened.
If she had got up earlier, she would have caught the bus.
（3）与将来事实相反的条件句
If…过去式或should do或 were to…,
…would/could/might/should do
If it were Sunday tomorrow, we wouldn’t have an exam.
If I had time tomorrow, I would certainly
go to help you.
如果我明天有时间，我一定来帮你。
1 If you had worked carefully ,you __________________(not make) so many mistakes.
2 If you _________(come) to my house yesterday,you ______________ (see) my cousin John.
用所给动词的正确形式填空
wouldn’t have made
had come
would have seen
He___________(show) you the pictures he took in the summer holidays if you ____(be)to see him tomorrow.But it seems you are too busy to go.
If he_________(finish) the work on time, he would surely do.
3 I _________(ask) my parents for help if I _____(be) you.
would ask
were
should show
were
finished
二： 虚拟语气假设条件句型注意点：
1.假设条件虚拟倒装。 条件从句中有should， were， had三个助动词可以把if省略，并将这三个词提至句首。
If I were you, I would give it up.
Were I you, I would give it up.
____,I would take an umbrella with me.
Had I been you B.I were you
C. Were I you D. I had been you
If I had had time, I would have run round that lake again.
__________time, I would have run round that lake again.
If there should be a flood, what should we do
_______________a flood, what should we do
句型转换
Had I had
Should there be
2.当虚拟条件句中的主从谓语动词发生的时间不一致时，动词要依照各自的具体时间来确定所需的形式。
If you had worked harder, you might succeed now.
If you had followed the teacher’s advice, you wouldn’t be in the hospital.
。
1.Given more time, Ben_______________(do)the work much better.
2. _____Su Yang ____(get) to Beijing one day, she______________(visit ) the Forbidden City,where the emperors once lived.
would have done
Should
get
would visit
一、配对题
( )1.If Tony had been to China
( )2.Had you told me about it earlier
( )3.If you knew how to shoot a film
A we would invite you to the conference
B he would have visited BeiJing
C I wouldn’t have made that mistake
D He would be considered impolite.
B
A
C
Please make a sentence
by using ‘if ’.
用if从句将下面的两句话合并成一句。
1 . Tom doesn’t know her teacher’s name. He can’t send her a card.
2. George ignores Rocky. Rocky gets angry at him.
If Tom knew her teacher’s name, he could send her a card.
If George didn’t ignore Rocky, Rocky wouldn’t get angry at him.
3. The water was very deep. It was impossible for the soldiers to walk to the beach.
4. Kitty doesn’t take enough food. She is so thin.
If Kitty took enough food, she wouldn’t be so thin.
If the water hadn’t been very deep,
it would have been possible for the
soldiers to walk to the beach.
单句改错
1、If I am a fish ,I could swim freely in the sea.
2、Had you told me earlier, I would finish the task ahead of time.
3、Would Ma Li come to Beijing , I would meet her at the airport.
___
were
have finished
____
_____
Should
You are very lucky. No exercises for you ,but please smile at your classmates
If I were the headmaster,
I …
Imagining Time
虚拟语气特殊句型：
1.Wish 2.would rather that
3.as if /though + Clause
4.It’s (about/high) time +that ---
5.表示要求，命令，建议的虚拟语气。 6.without和but for 构成虚拟
7.If only…
8.It’s necessary /strange/ natural/ important + that--Clause
条件从句
if 从句的谓语形式
主句的谓语形式
现在
过去时（were）
Would/could/should/might +V.（原）
过去
过去完成时
Would/could/should/might+have+p.p.
未来
1.过去时
2.should+V.
3. were to do
would/could/should/might +V.（原）
虚拟语气在条件状语从句中的用法。
Summary