Unit 3 Feelings and Emotions语法专项课件— 过去进行时与 when, while 的用法课件(共30张PPT)-2025-2026学年北师大英语八年级上册

(共30张PPT)
教学课件
北师大英语八年级上册
Unit3 语法专项——过去进行时与 when/while 的用法
全解精讲+分层练习
学习目标
掌握过去进行时的核心含义、基本结构和动词-ing变化规则
熟记过去进行时的时间状语，能正确判断使用场景
掌握when和while的核心用法及区别，灵活搭配时态
能运用过去进行时与when/while完成句式合并、转换
熟练完成单选、填空、句型转换等多种题型，规避易错点
过去进行时 核心含义
过去进行时表过去某一时刻/时间段正在进行的动作
强调动作的持续性、进行性，即动作在过去某点正在发生
区别于一般过去时的“动作完成”，侧重“动作正在进行中”
常和具体过去时间点、when/while从句搭配使用
过去进行时 基本结构（肯定/否定）
肯定句：主语 + was/were + 动词-ing形式
主语为I/he/she/it/单数名词，用was；you/we/they/复数名词用were
否定句：主语 + was/were + not + 动词-ing形式
was not缩写为wasn’t，were not缩写为weren’t，直接加在be动词后
过去进行时 疑问句结构
一般疑问句：Was/Were + 主语 + 动词-ing？
把be动词提至句首，回答用Yes, 主语+was/were./No, 主语+wasn’t/weren’t.
特殊疑问句：疑问词 + Was/Were + 主语 + 动词-ing？
疑问词（what/when/where/how）置首，对动作/时间/地点提问
动词-ing形式 变化规则（表格1）
变化类型 具体规则 例词
一般情况 直接加-ing look→looking; read→reading; walk→walking
不发音e结尾 去e，再加-ing make→making; take→taking; write→writing
重读闭音节 双写尾字母，加-ing run→running; stop→stopping; sit→sitting
动词-ing形式 特殊变化规则
以ie结尾的动词，变ie为y，再加-ing
例词：lie→lying（躺）; die→dying（死）; tie→tying（系）
这是高频特殊变化，无其他规律，需单独记忆
注意：开音节动词无需双写，如open→opening（非重读闭音节）
过去进行时 常见时间状语
具体时间点：at 7 o’clock yesterday; at this time last night
时间段：from 8 to 10 yesterday morning; the whole morning last Sunday
模糊时间：at that time; just then
从句搭配：when/while引导的过去时间状语从句
过去进行时 例句
1.I was doing my homework at 8 o’clock last night.
（昨晚八点我正在做作业。）
2.She wasn’t reading a book when I saw her.
（我看到她时，她没在看书。）
3.Were they playing football on the playground
（他们当时在操场上踢足球吗？）
4.What was he doing at this time yesterday
（昨天这个时候他在做什么？）
when 连词 核心用法
when引导时间状语从句，表“当……时候”
从句动作可以是短暂性（瞬间完成）或延续性（持续进行）
主句和从句动作可同时发生，也可先后发生
时态搭配灵活，是使用范围最广的时间连词
while 连词 核心用法
while引导时间状语从句，表“在……期间”
从句动作必须是延续性的，不能是瞬间动作
强调主句和从句动作同时发生、持续进行
从句常用进行时态，主句根据语境搭配时态
when与while 核心区别表
连词 从句动作类型 动作发生关系 时态搭配特点
when 短暂性/延续性 同时/先后 从句可普过时/进行时
while 仅延续性 仅同时 从句多为进行时
核心句式1 过去进行时+when+一般过去时
表一个动作正在进行时，另一个短暂动作突然发生
主句用过去进行时（延续动作），when从句用一般过去时（短暂动作）
例句：I was walking in the street when I met my old friend.
（我正在街上走，突然遇到了我的老朋友。）
核心句式2 过去进行时+while+过去进行时
表两个延续性动作在过去同时进行
主、从句均用过去进行时，强调“一边……，一边……”
while可置句首或句中，置句首时用逗号与主句隔开
例句：While my mom was washing clothes, I was cleaning the room.
when/while 句式互换技巧
当when从句表延续性动作时，可与while互换
例句：When she was singing, I was dancing.
= While she was singing, I was dancing.
短暂性动作从句只能用when，不能用while
例句：When I was reading, the bell rang .（不可用while）
过去进行时 vs 一般过去时 核心辨析
过去进行时：过去某点正在做，强调动作进行的状态，未体现完成
一般过去时：过去做了，强调动作完成的结果，无进行状态
时间状语不同：过去进行时常接具体时间点，一般过去时常接模糊过去时间
例句：He read a book yesterday.（普过时，动作完成）
He was reading at 8 yesterday.（过去进行时，正在读）
语法小练 单项选择
1.He ______ basketball with his friends when I called him.
A. plays B. played C. was playing D. is playing
2.______ we were having dinner, the phone rang suddenly.
A. When B. While C. Because D. If
3.What ______ you ______ at 9 o’clock last Sunday morning
A. do; do B. did; do C. are; doing D. were; doing
4.My sister ______ TV at this time last night.
A. watches B. watched C. was watching D. is watching
C
B
D
C
5.I was walking to school ______ I saw a dog on the road.
A. when B. while C. so D. but
6.While my father ______ a newspaper, he heard a loud noise.
A. reads B. read C. was reading D. is reading
7.Were you ______ to music when the teacher came in
A. listen B. listened C. listening D. listens
8.She ______ not ______ her homework at 8 last night. She was playing.
A. is; doing B. was; doing C. did; do D. does; do
A
C
C
B
9.______ was your brother doing when the rain started
A. What B. When C. Where D. How
10.While they ______ in the park, they saw a beautiful bird.
A. walk B. walked C. were walking D. are walking
11.When I got to the cinema, the movie ______, so I missed the beginning.
A. starts B. started C. was starting D. is starting
12.______ Jane was writing a letter, her brother was playing games.
A. When B. While C. After D. Before
A
C
C
B
13.I ______ a shower when the doorbell rang.
A. take B. took C. was taking D. am taking
14.They ______ football on the playground from 3 to 5 yesterday afternoon.
A. play B. played C. were playing D. are playing
15.—What was she doing —She ______ a book in the library.
A. reads B. read C. was reading D. is reading
C
C
C
语法小练 用所给词适当形式填空
1.While my mother ______ (cook) breakfast, I __________ (brush) my teeth.
2.What ______ you __________ (do) when your father came back
3.He ________ (not play) computer games at 8 last night. He was studying.
4.When the light went out, we _____________ (watch) a movie.
5.______ (be) your sister ________ (draw) a picture at this time yesterday
was cooking
was brushing
were doing
wasn’t playing
were watching
Was drawing
语法小练 用所给词适当形式填空
6.While they ______ (walk) in the park, it started to snow.
7.I ________ (talk) with my friend on the phone when my mom called me.
8.What ______ Tom ___________ (do) when you saw him
9.She _________ (dance) in the room while her brother _________ (sing).
10.When the teacher came in, the students _____________ (not read) books.
was talking
was doing
was dancing
was singing
weren’t reading
were walking
语法小练 句型转换
1.I was reading a magazine at 7 last night.（改为一般疑问句）
______ you __________ a magazine at 7 last night
2.He was playing football when it rained.（对划线部分提问）
______ was he ______ when it rained
3.My brother was doing his homework. The doorbell rang.（合并为一句）
My brother was doing his homework ______ the doorbell rang.
Were reading
What doing
when
语法小练 句型转换
4.They were watching TV while their parents were cooking.（改为否定句）
They __________ __________ TV while their parents were cooking.
5.She was washing clothes at this time yesterday.（对划线部分提问）
______ was she washing clothes
6.I was walking to the shop. I met my teacher.（合并为一句）
______ I was walking to the shop, I met my teacher.
weren’t watching
When
While
7.Were they playing basketball on the playground （作否定回答）
No, _________ _________.
8.He was writing a letter when I saw him.（用while改写，保持句意）
__________ he was writing a letter, I saw him.
9.The students were talking loudly. The teacher came in.（合并为一句）
The students were talking loudly ______ the teacher came in.
10.She was not singing a song. She was dancing.（合并为一句）
While she was dancing, she ______ ______ a song.
they weren’t
While
When
wasn’t singing
语法小练 根据汉语完成句子
1.昨天下午四点，我正在画画。
I ______ ______ a picture at four yesterday afternoon.
2.当莉莉在做作业时，她的弟弟在看电视。
______ Lily was doing her homework, her brother ______ ______ TV.
3.我正在听音乐，这时电话响了。
I ______ ______ to music ______ the phone rang.
4.昨晚九点你在做什么？
What _________ you ________ at nine o’clock last night
5.当我到达车站时，公交车正要离开。
When I got to the station, the bus ______ ______.
was drawing
While was watching
was listening when
were doing
was leaving
高频易错点
混淆过去进行时和一般过去时，具体时间点用一般过去时
动词-ing变化错误，如lie→lieing（正确为lying）、make→makeing
when和while混用，短暂性动作从句用while
过去进行时结构遗漏be动词，如I reading a book at 8 yesterday
主谓搭配错误，如He were playing football（正确为was）
否定句结构错误，如I was not play the piano（正确为playing）
语法辨析 延续性动词vs短暂性动词
延续性动词：表动作可持续，如read/walk/cook/play，可用于进行时
短暂性动词：表动作瞬间完成，如come/go/ring/meet，不可用于进行时
判断关键：动作能否持续一段时间，短暂性动词不可用在while从句中
单元核心 知识总结
过去进行时表过去某点/段正在进行的动作，结构为was/were+动词-ing
动词-ing有规则变化和特殊变化，lie/die/tie需重点记忆
when接短暂/延续动作，while仅接延续动作，核心搭配两种时态句式
过去进行时强调“正在进行”，区别于一般过去时的“动作完成”
教学课件
Unit3 语法专项——过去进行时与 when/while 的用法
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