人教版九年级下册 Unit12 Life is full of the unexpected. SectionA 1a-2d 课件(共22张PPT)

(共22张PPT)
Life is full of the unexpected.
学习目标
1. 能正确使用以下词汇及短语：
unexpected, backpack, oversleep, by the time
2. 了解并运用以下句型：
By the time I got outside, the bus had already left. When I got to school, I realized I had left my backpack at
home.
3. 了解过去完成时时态的结构及用法
4. 能学会合理安排自己的学习和生活，做到守时守信
Step 1 Self-learning
Step 2 Group-learning
Step 3 Showing and Questioning
Step 4 Explaining
now
my brother had gotten in the shower I got up
(1) 我起床的时候，我哥哥已经在洗澡了。
By the time I got up, my brother _____ already
_______ in the shower.
gotten
had
now
the bus had left I went outside
(2) 当我出来时，公共汽车已经离开了。
By the time I went outside, the bus _____ already
_______.
left
had
by the time 意为“到……时候, 到……之前”, 常引导表示过去的时间状语从句，
主句常用过去完成时，即had+动词过去分词。
e.g. By the time I got up, my brother had
already gotten in the shower.
now
I had left my backpack I got to school.
(3) 当我到达学校的时候，我才意识到我把书包落在
家里了。
When I got to school, I realized I _____ _______
my backpack at home.
left
had
(4) 难怪你看起来焦虑不安。
No wonder you _____ _______.
looked
stressed
his grandma
come back
Li Ming finish his homework
By the time his grandma came back,
Li Ming had finished his homework.
Make a sentence according to the pictures.
the policeman get to the shop
the thief run away
By the time the policeman got to the shop, the thief had run away.
Liu Mei get there
the concert be over
By the time Liu Mei got there, the concert had been over.
Have you ever had unexpected situation in your life Make a conversation: (using the past perfect tense)
A: What happened
B: …….
happen 是不及物动词，没有被动语态， 意为“ 发生，碰巧”， 指偶然发生的事件。
sb. happen to do sth 意为“某人碰巧做某事”。
sth happen to sb 意为“某人发生某事”
retell Mary’s day
Mary ________ this morning. By the time she ________ up, her brother _______ already _______ in the shower. She had to take a quick shower and got dressed. But by the time she _______ outside, the bus _______ already _______. So she ran all the way to school. But when she got to school, she realized she _______ _______ her backpack at home. What a bad day!
overslept
got
had
gotten
went
had
left
had
left
Make conversations:
（1）happen 是不及物动词，没有被动语态，意为“ 发生，碰巧”， 指
偶然发生的事件。
sb. happen to do sth 意为‘‘碰巧做某事’’。
sth happen to sb 意为“ 某人发生某事”。
　 （2） by the time 意为“到……时候, 到……之前” , 常引导表示过去的
时间状语从句，
主句常用过去完成时，即had+动词过去分词。
（3 ） leave sth. at/in…. + 地点 意为“把某物落在某地”
forget to do sth. 意为“忘记去做某事”
（4） 过去完成时：
构成：由“助动词 had (用于各种人称和数) + 动词过去分词” 构成
它所表示动作发生的时间是“过去的过去”。
Step 5 Summary
Step 6 Test
( ) 1. _____ I got up, my mother _____ already gotten into the
shower.
A. By time; has B. By the time; had C. Any time; had
( ) 2. When my mum________ , she realized she had left her bag
on the bus.
A. got on a bus B. got home C. got in the way
( ) 3. When Tony _____ to the classroom this morning, we _____ our
math class.
A. got; had finished B. got; finished C. had gotten; finished
B
A
B
An hour in the morning is worth two in
the evening.
一日之计在于晨。