Unit 5 What were you doing when the rainstorm came?能恰当运用过去进行时结构进行提问和叙述（课件12张）

(共12张PPT)
课题：unit5.What were you doing when the rainstorm came
难点名称：能正确使用连词when 和while，能恰当运用过去进行时结构进行提问和叙述。
1
八年级英语-下册-第五单元
导入
2
When/while的相同点
Father，we succeed in catching them.
Baby，although we caught them，they are different！
The same：they are both lovely
The difference：the one
live in the water
the other
live on the land
little animal
区别
知识讲解
1.词义
难点突破
①
when
当......的时候
（时间点）
I was about to leave my room when some one knocked the door at 11:00AM.
②
while
当......的时候
（时间段）
It was raining hard while we were watching TV at home fom7:00 to 9:00 in the mornig.
Summary
when 后面一般是跟一个时间点
while 后面一般是跟一个时间段
时间点
时间段
at 9:00
at 6:00 PM
during morning(9:00-12:00）
from 6:00 to 9:00 in the afternoon
知识讲解
2..时间状语
难点突破
①
when
用 at ＋时间（点钟）
即可是终止性动词，也可以是延续性动词
②
while
during ＋一段时间
必须是延续性动词
Summary
终止性动词
延续性动词
learn, work, know, walk,keep ,have ,watch, sing ,read ,sleep,live
open,begin ,finish ,come ,go,move ,borrow,lend,buy
When you called me last night, I was playing the piano.
I was bathing last night when Tim was watching TV .
while my mom was walking in the garden,I finished homework last day.
课堂练习
5
难点巩固
你到我家来，我去你家玩
1.
leave
borrow
buy
begin/start
finish
be away
keep
have
be on
be over
当句子用while来引导从句时，主句和从句的动词的动作要同时发生
知识讲解
难点突破
当句子用when引导的从句时，主句的动作和从句可以是同时，也可以是先后发生
你想知道when /while引导句子时，主句的变化吗？Let's go!
知识讲解
难点突破
1.when引导的时间状语从句，主句用过去进行时，从句一般用过去时
2.如果主句与从句的动作同时发生。都用过去进行时的时候，就要用while
小火车，小火车when/while引导的时间状语从句时的时态是怎样的？
知识讲解
难点突破
过去进行时
过去进行时
2.结构：be doing其中be （was/were）
1.定义：过去的某个时间点或时间段正在发生的动作，常和表过去 时间状语从句连用
I was doing my homework at this time yesterday.
They were waiting for you yesterday
①肯定句 主语＋was/were doing
②否定句 主语＋wasn't/weren't doing
③疑问句 Was/Were＋主语＋doing
④特殊疑问句 特殊疑问词＋疑问句 ？
what
for example
for example
structures
知识讲解
难点突破
他们/他在那个点正在干什么？
过去
现在
将来
at 9:00 last sunday
at that time last week
at 6:00pm last day
1.What were they doing

at 9:00 last sunday
They were doing home work
.
2.What was he doing
at that time last week
He was playing football
at 6:00pm last day
3.What were they doing
They were doing home work


.
.
【课堂小结】
主句和从句的动作在过去的某时刻或某
段时间同时发生，而且动作都是持续性
的，此时用 _________ 引导从句，而且主
句和从句都用 ____________ 时态。
我知道
while
过去进行时
小结
课堂练习
11
难点巩固
1.When I down, my mother the housework.
A:lied; did B:lied; was doing C:was lying; was doing ; D:lay; was doing
2.My father was reading a newspaper while my mother dinner．
A:is cooking B:cooks C:was cooking D:will cook
3.---What were you doing when he_______________ “hello” to you
—I in front of the blackboard.
A:was saying; read B:was saying; was reading C:said; read D:said; was reading
4.Tom Cook called his mother every week even while he around the world.
A:was traveling
B: is traveling
C:traveled
B
C
D
A
大显身手
6.While John was taking photos, Mary bought a drink.
John was taking photos when Mary bought a drink.
7.John was playing the piano when Mary left the house.
While John was playing the piano, Mary left the house.
【课堂小结】
Thanks for listening