人教九年级Unit 12-Period 4 grammar（课件）

(共13张PPT)
Unit 12
Life is full of
the unexpected.
Grammar Focus
1) 当我到达学校的时候，我才意识到我把书包忘在家里了。
______ I got to school, I realized that I ____ ____ my backpack at home.
2) 我回到学校的时候，铃声已经响了。
___ ___ ____ I got back to school, the bell _____ _______.
When
had
left
By the time
had
根据汉语提示完成句子。
Which action happened first
rung
由 等引导时间状语从句时，若描述发生在过去的事，主句常用过去完成时( )表示动作发生在过去的过去。
when, by the time, before
had + 过去分词
宾从中，主句谓语为过去式said,asked,told,knew,realized从句动作先于主句，从句用完成时
1. 肯定式：主语 + had + 动词的过去分词 + 其他.
过去完成时的构成
e.g. When I woke up, it had stopped raining.
By the time I got to the airport, the plane had taken off.
2. 否定式：主语 + had not / hadn’t + 动词的过去分词+ 其他.
e.g. Julian hadn’t cleaned up the house before his
mother got home yesterday afternoon.
e.g. —Had you learned about the culture in the country before you came here
—Yes, I had. / No, I hadn’t.
3. 一般疑问句式：Had + 主语 + 动词的过去分词 + 其他
肯定回答：Yes, 主语 + had. 否定回答：No, 主语 + hadn’t.
4. 特殊疑问句式：疑问词 + had + 主语 + 动词的过去分词+其他
e.g. How many times had you been to Beijing before you went to college
1. Tim went into the bathroom. Mary got up.
By the time Mary got up, Tim had already gone into
the bathroom.
2. The coffee became cold. I put cream in the coffee.
3. The teacher collected the math homework. I got to school.
Before I could put cream in the coffee, the coffee had become cold.
By the time I got to school, the teacher had collected the math homework.
Make sentences using by the time or before.
4. I completed the work for my boss. The workday ended.
5. The movie started. I arrived at the cinema.
6. My mother finished making the apple pie. I got home from my language course.
I had completed the work for my boss before the workday ended.
The movie had started before I arrived at the cinema.
By the time I got home from my language course, my mother had finished making the apple pie.
Make sentences using by the time or before.
Fill in the blanks with the correct forms of the words in the box.
1. By the time I arrived at the party, everyone else ___ already __________.
2. When he put the noodles into a bowl, he realized he ___________ to add the green beans.
3. By the time my mother came back from the market, I ___ already ________ of the door to go to my piano lesson.
4. Before she got to the airport, she ___________ about the earthquake.
5. When she________ the movie theater, she remembered she had forgotten to feed her dog.
6. Before she got a chance to say goodbye, he __________ the building.
rush out forget
arrive at
go into show up
find out
shown up
had
had forgotten
had
rushed out
had found out
had gone into
arrived at
1.Complete the passage with the correct form of the words in the
box.
cancel, miss, west, accident, lady, officer, market, unexpected
Last Saturday after my French course, I decided to drive to the ______ to buy a meat pie for dinner. As I was heading ____, I saw a huge truck in the middle of the road.
market
west
There had been a (n) _______and there were many police _______ around. I turned around and decided to go to a nearby mall. However, I ______the road that led to the mall. Then I saw a restaurant that sold chicken noodles. I went inside and the _____, who was the owner, served me the most delicious bowl of chicken noodles ever. I had made a(n) __________discovery! I’m so glad that I _______ my plan to go to the market.
accident
officers
missed
lady
unexpected
canceled
cancelled
Self Check
现在完成时&过去完成时
时态 时间状语不同 例句
现在完成时 yet, already， recently,for, since We have lived here for ten years.
过去完成时 by, by the end of, by the time, before, when， 宾从中，主句谓语为过去时，从句动作先于主句 We had lived here for ten years when we had to move last year.
When I got to school, I realized that I had left my backpack at home.
过去完成时的动作发生在“过去的过去”，表示过去某一时间以前发生的动作或存在的状态。
一般过去时表示过去某时间发生的动作或存在的状态。
e.g. After he had done his homework, he went out to play football.
By the time / When I got home, she had locked the door.
过去完成时与一般过去时
1. I often _____(go) for a picnic there when I was young.
went
Complete the sentences with the correct forms of the words in the brackets.
2. - Are you going anywhere
- I ________(think) about visiting my sister yesterday, but I have
changed my mind.
3. - Why are you standing here, Mrs. White
- I'm waiting for my son. He _________ (not come) back from school.
4. Joe, my close friend, _____ (move) moved to Beijing five years ago,
and I__________ (see) him since then.
5. - Do you know the Englishman
- Yes. I _________ (know) him for two years.
6. When she arrived at the movie theater, she remembered she
___________ (forget) to feed her dog.
thought
hasn't come
have known
haven’t seen
had forgotten
moved
1. 过去完成时的构成：_____+___________
2. 过去完成时表示：
__________________________________________
3. 过去完成时常与_________________________等引导的时间状语连用。
had
过去分词
when, before, by the time
过去某一时刻或动作之前已经发生或完成的动作