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(共34张PPT)
Grammar
Unit 8
Safe and sound
Learn the differences between 'when', 'while', and 'as' and practice their correct usage
By the end of this lesson, students will be able to:
learn the use of the past continuous tense
use the past continuous tense to write about an emergency or a natural disaster that happened in your hometown, or one you heard about









A
Past continuous tense
Suzy: There was an accident near our school at 4:10 yesterday afternoon.
It happened as we _____________ home from school.
Amy: I know. I saw it while I __________ my bike home. It ___________
when the police arrived.
Suzy: I didn't see it. I hope no one was badly hurt.
Past continuous tense
Listen to the conversation below and fill in the blanks.
were going
was raining
was riding
We use the past continuous tense to talk about things that were happening at a particular time in the past.
We form the past continuous tense like this: _________ + v-ing.
was/were
过去进行时表示过去某个时刻或某一时段正在进行的动作。
① I was watching TV at eight last night.
昨晚八点我正在看电视。
② He was waiting for the bus at this time yesterday.
昨天这个时候他在等公交车。
1. 定义
过去进行时
常与过去进行时连用的时间状语有： at this time yesterday / at 9:00 last night / the whole morning 等。
We weren't watching TV at that time.
那时我们没有看电视。
She was eating breakfast at 6 am yesterday.
她昨天早上6点在吃早餐。
否定句:
肯定句:
2. 结构
主语
+ was/were
+ V-ing
+其他.
主语
+ wasn't/weren't
+ V-ing
+ 其他.
- Were you playing basketball at that time
- Yes, we were. / No, we weren't.
—那时候你们在打篮球吗？
—是的，我们是。/不，我们没有。
一般疑问句:
肯定回答：Yes,
否定回答：No,
+ 主语
Was/Were
+ V-ing
+其他
主语
+ was/ were.
主语
+ wasn't/weren't.
特殊疑问句：
What were you doing at 7:00 last night
+ 主语
疑问词
+V-ing
+ was/were
+其他
你昨晚7点在做什么？
I was having breakfast at 7:00 am yesterday.
7:00 am yesterday
* 过去进行时表示过去某一时刻正在进行的动作。时
间点可以用介词短语、副词或从句来表示，也可由
上下语境暗示。
3. 用法
2. 过去进行时表示过去某阶段一直在进行的动作。
from 1982 to 1998
From 1982 to 1998, she was teaching at Yale.
3. 过去进行时常出现在讲故事的情境中。
① Alice was sitting with her sister by the river and her sister was reading a book.
② While she was falling, she was thinking about her cat, Dinah.
4. 短暂性动词，如decide、stop等。
有些动词通常不用于进行时，主要有：
1. 表示心理状态、情感的动词，如love、hate、like、know等。
2. 部分连系动词，如seem、appear等。
3. 感官动词，如see、hear、feel、smell、sound、taste 等。
Look at the pictures. Where were these people at 3 o'clock yesterday afternoon And what were they doing Write two sentences for each picture.
1. Rachel was at home. She was watching TV.
2. Jack and Kate _______________________
They _______________________________
were at the cinema.
were watching a film.
3. Tom _____________________________________
4. _________________________________________
_________________________________________
5. _________________________________________
_________________________________________
was in his car. He was driving.
Tracey was at the station. She was waiting for a train.
Mr and Mrs Hall were in the park. They were walking.
Past continuous tense
Read the conversation again and pay attention to the circled words.
Suzy: There was an accident near our school at 4:10 yesterday
afternoon. It happened as we were going home from school.
Amy: I know. I saw it while I was riding my bike home. It was
raining when the police arrived.
Suzy: I didn't see it. I hope no one was badly hurt.
当……时
What does these words mean
What are their similarities and differences
Using when, while
and as
when, while和as的相同点
when、while 和 as 这三个词均有“当……时候”的意思。
① There were already many people in the meeting room when he arrived.
② While Millie was watching TV, her mum was sleeping.
他到场时会议室已有很多人。
米莉在看电视时她妈妈在睡觉。
③ I saw a traffic accident as l was riding to school this morning.
今天早晨我骑车上学时看见一起交通事故。
when, while和as的不同点
1. when和as引导的时间状语从句中的谓语动词既可以是延续性的，也可以是瞬间性的；while引导的时间状语从句中的谓语动词只能是延续性的。
① It was raining hard when/as we arrived.
我们到达时正下着大雨。
② The phone rang while I was sleeping.
在我睡觉的时候 ，电话响了。
延续性动词：表示可以持续一段时间的动作或状态。例如: work(工作)，study(学习)，read(阅读)等。
瞬间性动词：表示在极短时间内完成的动作，无法延续。例如：arrive(到达)，die(死亡)，open(打开)等。
动词 时间状语
when引导的时间状语从句 瞬间性动词 / 延续性动词 时间段/时间点
while引导的时间状语从句 延续性动词 时间段
as引导的时间状语从句 瞬间性动词 / 延续性动词 时间段/时间点
① When/As he woke up, it was eight o'clock.
② While he woke up, it was eight o'clock.
③ When/While/As I was waiting for a bus, I met her.
判断正误。
( )
( )
( )
√
×
√
2. 当某个动作正在进行时，又发生了另一动作，我们常用过去进行时表示正在进行的长动作，用一般过去时表示短动作。
常用结构：一般过去时 +when/while/as+过去进行时。
① It began to rain heavily when/while/as we were having dinner.
② When/While/As we were reading, a stranger came in.
我们在吃晚饭时,开始下起大雨。
当我们正在看书时,一个陌生人走了进来。
这种情况下，连词 when、while、as 既可位于句中，也
可位于句首。
3. 谈论两个同时进行的长动作(事件、情况)，常用“过去进行时+ while+过去进行时”结构。
① They were rowing boats while we were climbing the hill.
② While she was making a phone call, l was writing an email.
当我们在爬山时,他们在划船。
当她在打电话时,我正在写一封电子邮件。
while可位于句首，也可位于句中。
4. 强调某个动作正在进行时，另一个动作突然发生，常用“过去进行时+when+一般过去时”结构。
① I was walking in the street when he called me.
② We were sleeping when the earthquake started .
他打电话给我时,我正走在街上。
开始地震时，我们正在睡觉。
Simon: Hello, Grandpa. How was your day
Grandpa: Not bad. Thank you, Simon. We just had the third snowstorm
of this winter. It (1)_____________(get) stronger while I
(2)___________(read) the newspaper at about 7 this morning.
What about you, Simon
Simon: We're all very well, Grandpa. It (3)____________(snow)here in
Beijing when we went to the Palace Museum during the day.
Lots of people (4)_______________(enjoy) the beauty of the
Palace Museum in the snow.
Grandpa: Sounds nice. Maybe I (5)______________(watch) the wonderful
view on TV while you (6)______________(visit) there.
Simon: Yeah, it was really e and take a look by yourself
next time.
Another snowstorm hit Harbin. Simon is asking his grandpa about plete their conversation with the correct forms of the verbs in brackets.
A
P113
got
was reading
was snowing
were enjoying
was watching
were visiting
Harbin woke up to a winter wonderland last week. There was a big
snowstorm.
When I got up on Saturday morning, it (1)______________(snow) heavily. The wind (2)______________(blow) hard all morning, but that just meant more time for fun inside with my family.
It stopped snowing in the afternoon. Guess what I did I built a
snowman! I (3)______________(draw) a big smile on his face, put my hat on his head and took a photo. When it was almost time for dinner, I went home. Some people in the neighbourhood (4)_____________(clear)
the snow from the streets.
When I got home, my parents (5)______________(get) dinner ready. While we (6)______________ (enjoy) our meal, it began to snow again. It was so nice to have hot jiaozi on a cold day!
Simon's cousin Vicky is writing about the plete her article with the correct forms of the verbs in brackets.
B
P113
was snowing
was blowing
drew
were cleaning
were getting
were enjoying
C
P113
Write about an emergency or a natural disaster that happened in your hometown, or one you heard about, using the past continuous tense.
1. Mary ________ a picture when her dad go home
yesterday evening. (2025北京)
A. draws B. was drawing
D. is drawing C. will draw
2. - Cindy, my sunglasses are on the floor and they
are broken. What happened
- Sorry, dear. I don’t know. I _________ in the
kitchen then. (2025甘肃)
A. cook B. was cooking
C. have cooked D. will cook
中考链接
3. Hey, John! what's up I _____ a shower when you
called. (2024 江苏无锡)
A. had taken B. have taken
C. was taking D. am taking
4. While we _____ an English song, some visitors
came into our classroom. (2024 黑龙江)
A. were singing B. sang C. are singing
5. - Helen, I didn't see you in the classroom at five
yesterday afternoon.
- Oh, I _____ singing for the graduation ceremony
at that time. (2024云南)
A. will practice B. have practiced
D. was practicing C. am practicing
6. When I saw Xiao Wang yesterday, he ____ an old
man cross the road. (2024福建)
A. helps B. was helping C. will help
根据汉语意思完成句子，每空一词。
1. 第二天早上，娜娜醒来时，阳光正透过卧室的窗户照进来。 【2025陕西】
When Nana woke up the next morning, the sunshine
_______ _______ in through her bedroom window.
2. 登山者们正在尽最大努力登顶，那时突然开始下大雪了。 【2023北京】
The climbers _______ _______ _______ ________ to
reach the top when it began to snow heavily.
was shining
were doing their best
I. 单项选择。
1. — Why are you so happy, Jack
— I met an old friend ______ I was walking on the street.
A. if B. till C. after D. while
2. Tom ______ his homework when his mother got back home.
A. did B. is doing C. was doing D. will do
3. — Lucy, what time did your uncle leave
— I don't know, Mum. I ______ music in my room.
A. listen to B. listened to
C. am listening to D. was listening to
4. — I ______ you at 6 pm yesterday, but nobody answered me.
— Sorry. I ______ the drums at that time.
A. called; played
B. called; was playing
C. was calling; played
D. was calling; was playing
5. — Vivian, could you please answer the question
— Sorry, I ______. Could you say it again
A. wasn't listening B. don't listen
C. am not listening D. won't listen
1. ________ we got to Nanning, it was raining.
2. John was taking photos ______ Mary bought a
drink.
3. The teacher was playing the piano ________ the
students were singing.
4. _______________ the students were cleaning the
classroom, the head teacher arrived.
Ⅱ. 根据句意，用when或while填空。
When
when
while
When/While
1. Can you make sentences using the past continuous tense
2. Can you use when, while and as correctly
1. Write a short text about the first snow of this year using the past continuous tense and when, while and as.
2. Preview Word Power on page 114.

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