人教版九年级下册 Unit12 Life is full of the unexpected. SectionA Grammar focus 4a-4c 课件(共21张PPT)

(共21张PPT)
Unit 12
Life is full of the unexpected.
Section A
（ Grammar Focus – 4c ）
一、教学目标：
1. 语言知识目标：
1) 学习掌握下列词汇：cream, workday, pie, show up, bean, market, by the end of
2）进行一步复习巩固学习Section A 部分所学的生词和词组。
3）巩固过去完成时的用法
2. 情感态度价值观目标：
1）能运用所掌握的语法，句型和词汇进行交流。
2）能比较流利地讲述自己曾经有的特别的经历。
二、教学重难点
1. 教学重点：
1) 复习巩固Section A 部分所学的生词和词组，达到熟练运用的目标。
2) 总结过去完成时的不同句型。
3）总结过去完成时的用法。
2. 教学难点：
过去完成时的用法
What a bad morning!
What about your morning
First, I had overslept when the clock went off.
Then by the time I made the banana pie, I had hurt my finger with a knife.
Before I went to school, I had bandaged my finger up.
By the time she got up, her brother had already gotten in the shower.
By the time she went outside, the bus had already left.
When she got to school, she realized she had left her backpack at home.
What happened to Mary
1.构成：主+_____+___________
had
V过去分词
2.过去完成时常与______________________等引导的时间状语连用。
when, by the time , before, by
过去完成时表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（ past-in-the-past ）”。
　　　　　
7 o’clock
8 o’clock
now
the bus had left
went outside
had left … at home
got to school
By the time she went outside, the bus had already left.
When she got to school, she realized she had left her backpack at home.
past
past in past
now
一般过去时表示在过去某时发生的动作或存在的状态。
例：We started to learn English 5 years ago.
我们五年前开始学英语。
对比
一般过去时与过去完成时
5 years ago
now
past
now
1）在以上的时间状语从句中，主句和从句的动作是同时发生，或者是在进行一个动作时，另外一个动作突然发生。
2）主从句都用一般过去时态的时间状语从句引导词有（when , as ）等
When he came in, the students stood up.
When the baby saw her mother, she stopped crying.
He was about to watch a movie when his parents knocked at the door.
They were about to get on the bus when they heard someone shout.
As I was standing in front of the teacher’s office, I saw a boy fight with another boy.
As he was doing housework, a bird flew into the kitchen.
思考与讨论： 1. 在以下的时间状语从句中，主句和从句的动作是先后发生还 是同时发生？ 2. 主从句都用一般过去时态的时间状语从句的引导词有什么？
past
past in past
now
the bus had left
went outside
past
now
5 years ago
now
过去完成时表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（ past-in-the-past ）”。
　　　　　
一般过去时表示在过去某时发生的动作或存在的状态。
一般过去时与过去完成时
Grammar
Focus
When I went to school, I realized that I had left my backpack at home.
By the time I got back to school, the bell had rung.
Before I got to the bus stop, the bus had already left.
I was about to go up to my office when I decided to get a coffee first.
As I was waiting in line with the other office workers, I heard a loud sound.
◆ When I got to school, I realized that I had left my backpack at home.
◆ By the time I got back to school, the bell had rung.
◆ Before I got to the bus stop, the bus had already left.
由when, by the time, before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(had + 过去分词)表示动作发生在过去的过去。
◆ I was about to go up to my office when I decided to get a coffee first.
◆ As I was waiting in line with the other office workers, I heard a loud sound.
be about to do, be doing等表示即将或正在做某事时，常用when引导从句表示突然发生的动作。
4a
Make sentences using by the time or before.
Before I put cream in the coffee, the coffee had become cold.
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 (n. 奶
油) in the coffee.
__________________________________
__________________________________
3. The teacher collected the math homework. I got to school.
__________________________________
__________________________________
4. I completed the work for my boss. The workday (n. 工作日) ended.
__________________________________
__________________________________
By the time I got to school, the teacher had collected the math homework.
I had completed the work for my boss before the workday ended.
5. The movie started. I arrived at the cinema.
__________________________________
__________________________________
6. My mother finished making the apple pie
(n. 果馅派). I got home from my language
course.
__________________________________
__________________________________
__________________________________
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.
4b
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 (n. 豆).
rush out, forget, arrive at, go into,
show up (赶到；露面), find out
showed up
had
had forgotten
3. By the time my mother came back from the market (n. 市场), I ____ already __________
the door to go for 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.
had
rushed out
arrived at
had gone into
had found
out
4c
Write two true statements and one false statement about your day yesterday. Then ask your classmates to guess the false statement.
1. By the time I left for school in the morning, __________________________________
__________________________________
__________________________________
I had already had breakfast.
I had already had supper.
I had already had my hair cut.
2. By the end of the school day,
__________________________________
__________________________________
__________________________________
3. By dinner time, I_________________________________
I_________________________________
I_________________________________
2. By the end of the school day,
__________________________________
__________________________________
__________________________________
I have got a present from Tom.
I had had these articles read.
I had finished my homework.
3. By dinner time, I_________________________________
I_________________________________
I_________________________________
had had too many apples.
had eaten plenty of meat.
have had all the housework finished.
Building a story
Each of you need to contribute at least two sentences to the story with one sentence using the past perfect tense.
Two weeks ago, when I got home from school, I found that there was no one at home. I was surprised because my grandmother is usually waiting for me. I looked around to see if there was a note, but there was none. ......