外研版英语八年级上册 Module 7 Unit 1 Alice was sitting with her sister by the river. 课件 (共19张PPT)

(共19张PPT)
Past Continuous Tense
(过去进行时)
What were you doing
at 8：30 yesterday morning
We were reading a book.
Group work
参考课本128-130页过去进行时讲解，小组讨论并总结过去进行时的结构、肯定否定形式、疑问形式，特殊疑问句,标志词when,while用法。
过去进行时
与一般过去时的区别
用法
各种句式结构
时间状语
谓语构成
while,when用法
基本结构：was/were+v-ing
过去进行时
表达：
过去正在做某事
过去进行时用法：表示在过去某一时刻或某一时段正在进行的动作。
过去进行时的句式变化
肯定式: 主语+was/ were +V-ing
否定式: 主语+was/ were not +V-ing
一般疑问式及其回答:
Was / Were+主语+V -ing
Yes，主语+was/ were.
No，主语+wasn't/ weren't.
特殊疑问式:特殊疑问词+was/were+主语+V-ing
时间状语标志：
1 at +过去的时间点
2 from ----to --- 过去时间段
3 When 当----时
4 while 在----期间
常用的时间状语：
at this/that time yesterday,
at nine last night,
the whole morning,
from nine to ten last evening,
then,
at that moment
一般过去时与过去进行时的区别
1、一般过时往往表示某一动作已经完成，而过去进行时却表示动作在持续或未完成。
　比较：
She wrote a letter to her friend last night.
她昨晚给朋友写了封信。 (信写完了)
She was writing a letter to her friend at eight o’clock last night. 她昨晚一直在给朋友写信。 (信不一定写完)
when 和while引导的时间状语从句
以when, while引导的时间状语从句
延续性动词：指动作可以延续一段时间，而不是瞬间结束。
如：work、study、drink、eat等。
终止性动词（非延续性动词)：指动作极为短暂，瞬间结束如：start、begin、buy、die等。
Amy was reading a book when I came in.
从句：
一般过去时
主句：过去进行时
从句：过去进行时
主句：
一般过去时
突然性
只表示老师进来的事实，不强调突然性
When, while, 引导的时间状语从句需要注意的两个核心点。
注意主句、从句的时态搭配关系。
2. 注意主句、从句的谓语动词的延续性和短暂性。
用when, while 连接句子。
1) the teacher came in, we were reading.
2) The teacher came in we were reading.
3） The teacher came in we were reading.
4)The teacher was writing we were reading.
When
when
while
while
Consolidation
调查同组内同学在上周末同一时间段都做了什么？然后进行汇报。
Eg:
Xiaoming was doing his homework while Li Hong was going shopping at nine last Sunday.
Sum-up
What have you got
in this lesson
小结
1.过去进行时：
2.句型：①肯：
②否定句
③变一般疑问句：
3.在时间状语从句中：
① when后面用
② while后面用
③ while表达“同时”时，
表达过去正在做某事。
was/were+v-ing
was/were后加not
was/were拿出来放在句首。
一般过去时
过去进行时
都用过去进行时