资源简介

(共35张PPT)
（人教新版）八年级
下
Nature’s Temper
Unit5
Section A Grammar focus
01
02
03
04
能够掌握过去进行时的结构（was/were + doing）、用法及时间标志词，并通过与一般过去时的对比，加深对过去进行时的理解。
能正确使用过去进行时 + when/while 描述自然灾害发生时的场景，完成句型转换、语篇填空；
能够了解龙卷风的相关知识以及应对措施，同时体会语篇中蕴含的“灾难无情人有情”的内涵。
理解并区分 when 和 while 引导时间状语从句的用法差异；
Learning objectives
Warming-up
Let's enjoy a song.
Pay attention to the lyrics in the video.
、
I was laughing and you were smiling.
Sun was shining and the birds were flying.
Wind was blowing and the waves were breaking.
We were playing together all day long.
过去进行时
the past continuous tense
Warming-up
、
1.定义
表示过去某个时刻或某一时间段正在进行或发生的动作。
The Greens were watching TV at 9:00 last night.
She was doing her homework from 5:00 to 6:00 yesterday afternoon.
过去进行时
the past continuous tense
Grammar1
、
I was having breakfast at 7:00 am yesterday.
7:00 am yesterday
过去进行时
the past continuous tense
2.用法
（1）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。
、
From 1982 to 1998, she was teaching at Yale.
from 1982 to 1998
过去进行时
the past continuous tense
2.用法
(2) 过去进行时表示过去某阶段一直在进行的动作。
、
过去进行时
the past continuous tense
2.用法
(3) 过去进行时可用来为一个或一系列动作的发生提供背景。
Everyone was enjoying the coffee.
Then a man entered the shop.
Everyone was enjoying the beautiful weather that morning. Some people were swimming in the sea, and some were relaxing on the beach.
、
过去进行时
the past continuous tense
3.标志词
at this/that time yesterday
at 9:00 yesterday morning
at the time of ...
at that moment, all night
from 8:00 to10:00 yesterday morning
when和while引导的时间状语从句
、
4.构成
They were running at that time.
John bought a drink while Mary was taking photos.
was/were+doing
什么时候用was
什么时候用were
过去进行时
the past continuous tense
、
Mary and Lily were not running at that time.
Mary bought a drink while John was taking photos.
什么时候用was
什么时候用were
Were you doing your homework at 8 o’clock yesterday morning
I was cleaning the floor at the time of the rainstorm.
She was waiting for the bus at that time.
主语是第一人称单数或第三人称单数时，用was
主语是第二人称和复数时用were
过去进行时
the past continuous tense
、
动词现在分词的变化规则:
口诀 规则 例子
直 1.一般情况下，直接在动词之后+ing. play—playing
study—studying
去 2.以不发音的e结尾的动词，去e再加ing. take—taking
dance—dancing
双 3.重读闭音节的动词，双写尾字母 再加ing. cut—cutting
swim—swimming
变 4.以ie结尾的动词，把ie变为y再加ing. lie—lying die—dying
tie—tying
过去进行时
the past continuous tense
、
5.句型
主语+was/were +动词-ing形式+其他.
肯定句
I was cleaning the floor at the time of the rainstorm.
She was waiting for the bus at that time.
过去进行时
the past continuous tense
、
主语+was/were not +动词-ing形式+其他.
否定句
They were not running at that time.
He was not reading at this time yesterday .
过去进行时
the past continuous tense
5.句型
、
They weren’t running at that time.
He wasn’t reading at this time yesterday .
was not=wasn’t
were not=weren’t
过去进行时
the past continuous tense
5.句型
、
Was/Were+主语+动词-ing形式+其他
Were you sleeping at 9 last night
过去进行时
the past continuous tense
Was she hanging out with her friend at that time
5.句型
、
Was/Were+主语+动词-ing形式+其他
肯定
回答
Were you sleeping at 9 last night
Yes, I was.
否定
回答
No, I was not./I wasn’t.
Yes, 主语+was/were.
No, 主语+was/were not.
过去进行时
the past continuous tense
5.句型
、
过去进行时
the past continuous tense
6.有些动词通常不用于进行时，主要有：
4. 短暂性动词，如decide、stop等。
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。
、
① He read a book last night.
昨天晚上他读了一本书。(读完了)
② He was reading a story book last night.
昨天晚上他正在读故事书。(可能读完了，也可能没有读完)
一般过去时 过去进行时
相同点 表示过去发生的动作 不同点
表示过去的时间里发生的动作，往往已经完成
表示过去某一时刻或时段正在进行的动作
7.一般过去时和过去进行时的区别：
、
直击中考
单项选择。
1. (2025年北京市)
Marry ______ a picture when her dad got home yesterday evening.
A. draws B. was drawing C. is drawing D. will drawing
2. (2025年北京市)
- Peter, did you play table tennis with your friends after school yesterday
-No, I didn’t. We ___ vegetables in our school garden.
A. water B. have watered C. watered D. are going to water
、
直击中考
3. (2025年天津市)
The mobile phone ____ when I was making a cake with my mother.
A. rang B. rings C. is ringing D. is going to ring
4. (2025年陕西，完型填空)
When Nana woke up the next morning, the sunshine _____ in through her bedroom window.
A. is shining B. shines C. was shining D. will shine
、
4a
Read the sentences. Underline the verbs which show an ongoing action in the past.
、
when引导的时间状语从句
when
当……时候
at or during the time that
It was snowing when we arrived at the station.
时间
状语从句
主句
瞬间
动词
一般
过去时
Grammar2
、
when引导的时间状语从句
when
当……时候
at or during the time that
When we were singing, she came in.
时间
状语从句
主句
延续性
动词
过去
进行时
、
when引导的时间状语从句
when
When we were singing, she came in.
It was snowing when we arrived at the station.
Summary1
when既指时间点，又指时间段；
when引导的时间状语从句中的动词可以是瞬间性动词，也可以是延续性动词；
when引导的时间状语从句常用一般过去时，也可以用过去进行时。
、
while引导的时间状语从句
while
当……时候
during the time that
While he was reading in the library, the rainstorm came.
时间
状语从句
主句
延续性
动词
过去
进行时
Grammar3
、
while引导的时间状语从句
while
当……时候
during the time that
They were singing while we were dancing.
主句
延续性
动词
时间
状语从句
过去
进行时
、
while引导的时间状语从句
while
Summary2
while只表示一段时间；
while引导的时间状语从句中的动词必须是延续性动词；
强调从句和主句的动作同时发生，两句都用过去进行时，多用while引导从句。
While he was reading in the library, the rainstorm came.
They were singing while we were dancing.
、
When he knocked at the door, I was sleeping. 他敲门时，我正在睡觉。
I was reading when the light went out. 我正在看书，这时灯突然灭了。
Tom was reading while Mary was drawing. 汤姆在看书，而玛丽在画画。
情况 用 when 用 while
从句是瞬间动作 可以 不可以
从句是延续动作 可以 可以
表示 “这时突然” 可以 不可以
表示对比 “而……” 不可以 可以
Summary
when和while的核心区别
、
1. I did my homework. The typhoon landed on the coast.
___________________________________________________________
2. The power went out. My father and I made dinner.
___________________________________________________________
3. Kate wrote a letter. Her brother called to warn her of the storm.
___________________________________________________________
4. My parents packed the supplies. I moved our things off the floor.
___________________________________________________________
S. I slept soundly. It rained cats and dogs.
___________________________________________________________
I was doing my homework when the typhoon landed on the coast.
The power went out while my father and I were making dinner.
Kate was writing a letter when her brother called to warn her of the storm.
My parents were packing the supplies while I was moving our things off the floor.
I was sleeping soundly while it was raining cats and dogs.
Combine each pair of sentences using when or while.
4b
go out（火或灯光）熄灭
warn sb of... 警告某人…
下倾盆大雨
、
Complete the passage with was, were, when, or while.
4c
The family ran to the safe room at once. _______ they were waiting, Jenny’s little sister started to cry. Dad gave her some chocolate and told her that they _______ hiding from an angry lion. Soon, she was laughing again.
At last, the storm passed. _______ they stepped outside, they found the sun shining. People were asking one another if they were safe while some _______ starting to clear the streets. Jenny smiled. The tornado was scary, but it also brought everyone closer together.
When Jenny looked up, thick black clouds were forming in the sky, and the rain _______ beating against their roof.
“Quick, this way,” said Dad.
was
were
While
When
were
抬头看
厚厚的乌云
形成
拍打
立刻
躲避
发现阳光闪耀
清理
bring everyone closer together 让大家的心靠得更近
龙卷风
、
A: What were you doing when the tornado hit
B: My family and I were hiding in a safe room.
A: What were you doing while you were waiting there
B: Oh, while I ...
My family and I were hiding in a safe room.
Excuse me, Miss. What were you doing when the tornado hit
Imagine that you are a reporter. Interview a member of Jenny’s family and find out what he or she was doing around the time of the tornado.
4d
Homework
- 基础作业：背诵语法规则，完成4b、4c错题订正；
- 提升作业：用过去进行时+when/while写一段50词左右的短文，描述一次自然灾害发生时的场景；
- 拓展作业：采访家人，记录一次难忘的经历，用过去进行时描述。

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