人教版九年级全册 Unit 12 Life is full of the unexpected. 课件(共21张PPT)

(共21张PPT)
难点名称：过去完成时及其用法。
人教版-九年级-Unit12
Life is full of the unexpected.
Learning goals:
1.Learn to talk about the unexpected
events with the past perfect tense.
2. Learn to use the past perfect tense
correctly.
Presentation
What happened to Mary
the bus left
left the backpack at home
overslept
run quickly
take a shower
By the time she got up,
her brother had already
gotten in the shower.
Mary got up late. She overslept.
Tell the story
Mary’s Bad Day
=when当…时候
oversleep-overslept-overslept
By the time she got outside,
the bus had already left.
She was running quickly.
When she got to school, she realized
she had left her backpack at home.
When she got home, she realized she had left her keys in the backpack.
Then she ran back to school quickly.
By the time she got back to school, the bell had rung.
By the time she walked into class,the teacher had strarted.
1. By the time she got up, her brother had already gotten
in the shower.
2. By the time she got outside,the bus had already left.
3. When she got to school, she realized she had left her
backpack at home.
4. When she got to school, she realized she had left her
backpack at home.
5. By the time she got back to school, the bell had rung.
6. By the time she walked into class,the teacher had
strarted.
1. By the time she got up, her brother had already gotten
in the shower.
2. By the time she got outside,the bus had already left.
3. When she got to school, she realized she had left her
backpack at home.
4. When she got to school, she realized she had left her
backpack at home.
5. By the time she got back to school, the bell had rung.
6. By the time she walked into class,the teacher had
strarted.
过去完成时（The past perfect tense）
1. 构成：
Tina had already finished her homework by 10 o'clock
yesterday night.
否定式：
缩写形式：
Tina hadn't finished her homework yet by 10 o'clock
yesterday night.
一般疑问形式：
Had Tina finished her homework yet by 10 o'clock
yesterday night
“助动词had + 过去分词”
had not + 过去分词
hadn't
Had + 主语 + 过去分词
2. 用法：
过去完成时表示在过去某一时间或动
作之前已经发生或完成了的动作。
过去的过去
now现在
future 将来
past 过去
11:00pm
10:00pm
I arrived home
my daughter went to bed
By the time I arrived home, my daughter had gone
to bed.
过去完成时：had+过去分词
过去的过去
A
B
通过之前的句子，我们来总结一下吧。
By the time I got up, my brother had already gotten in the shower.
By the time I got outside, the bus had already left.
When I got to the school, I realized I had left my backpack at home.
1. 这些句子是什么时态的句子 _____________
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的动作。即“__________”。结构为：_________
2. by the time 意思是 __________, = when, 后接过去时的句子时, 从句的谓语动词用____________
观察与思考：
过去的过去
过去完成时
had +过去分词
在 … 时候
过去式
过去完成时的判定
1.
时 间
状 语
2.
标志词+含义
(过去的过去)
3.
上 下 文
语 境
判断依据
过去完成时的判断依据
1.
时 间
状 语
by+过去的时间点
by短语+过去的时间点
before+过去的时间点
Jim had finished his homework by ten last night.
We had learned ten units by the end of last term.
Cindy had read 12 books before last week.
与already, just, ever, yet 等连用表示过去的过去。
He told me that his team had already won.
My brother said that he hadn't finished his work yet.
2.标志词+含义(过去的过去)
When she got home, her children had slept.
Before they arrived here,the film had already started.
By the time Tina got into the station, the train had left.
when/by the time/before+时间状语从句
3.上下文语境
I met my English teacher last week, I hadn't seen
her since I graduated.
1. By the time my parents arrived home yesterday, I
the dinner already.
A. cooked B. have cooked
C. had cooked D. was cooked
2. She already knew the secret but no one her.
A. has told B. told
C. will tell D. had told
Exercise
Can you do it
3. When I came in, he ____already (finish) his homework.
4. By the end of last year they (produce) more than 500,000 tractors(拖拉机).
5. He (work) on a farm for 3 years before he became a shopkeeper.
had finished
had produced
had worked
1.时间状语
by/by短语/before
+过去的时间点
2.标志词+含义(过去的过去)
already/just/ever/yet...
when/by the time/before+从句
3.上下文语境
判断依据
过去完成时
构成
“had + 过去分词”
用法
过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作。
Summary
过去的过去
Retell the story about Mary’s bad day.
Try to introduce your unexpected moment with what've you learned today.
Tomorrow is a new day, cheer up!
Thank you !