中小学教育资源及组卷应用平台
Unit
8
Natural
disasters
Grammar
设计说明
首先展示几组图片，复习现在进行时的用法，继而引出过去进行时，讲解其概念、结构和时间状语标志。然后通过大量的练习来练习和巩固该时态。在讲授when,
while和as的区别时，运用大量的图片和例句来进行详细讲解，总结规律，再通过一些练习进行巩固。
教学目标
通过本课节的教学，让学生达成以下目标：
1.知识目标：
掌握词汇：break,
break
down,
on
the
side
of
the
road
2.能力目标：
(1)学会使用过去进行时。
(2)学会使用when,
while和as。
3.情感目标：
通过对过去进行时的学习，培养学生讲述过去发生的事情的能力。
重点难点
重点：正确使用过去进行时。
难点：学会使用when，while和as。
教学准备
PPT课件；相关图片。
授课时数
1课时
教学过程
Step
1
Lead-in
1.
Show
some
pictures
and
ask:
What
is/are
he/she/they
doing?
Then
change
the
sentences
into
negative
forms
and
question
forms.
①He
is
playing
basketball.
He
isn’t
playing
basketball.
Is
he
playing
basketball?
②They
are
playing
with
a
yo-yo.
They
aren’t
playing
with
a
yo-yo.
Are
they
playing
with
a
yo-yo?
What
are
they
playing
with?
③She
is
watering
the
flowers.
She
isn’t
watering
the
flowers.
Is
she
watering
the
flowers?
Who
is
watering
the
flowers?
Step
2
Presentation
Show
them
some
pictures
about
the
past
continuous
tense
and
give
the
sentences
on
the
screen.
Then
change
these
sentences
into
negative
forms
and
question
forms.
①They
were
doing
morning
exercises
at
9:05
yesterday
morning.
They
weren’t
doing
morning
exercises
at
9:05
yesterday
morning.
Were
they
doing
morning
exercises
at
9:05
yesterday
morning?
Yes,
they
were.
/
No,
they
weren’t.
②They
were
playing
basketball
at
this
time
this
Sunday.
They
weren’t
playing
basketball
at
this
time
this
Sunday.
Were
they
playing
basketball
at
this
time
this
Sunday?
When
were
they
playing
basketball?
③She
was
reading
a
newspaper
from
10:00
to
10:30
yesterday
morning.
She
wasn’t
reading
a
newspaper
from
10:00
to
10:30
yesterday
morning.
Was
she
reading
a
newspaper
from
10:00
to
10:30
yesterday
morning?
When
was
she
reading
a
newspaper?
Step
3
Analysis
1.
Tell
students
when
to
use
the
past
continuous
tense:
We
use
past
continuous
tense
to
talk
about
things
that
happened
at
a
particular
time
in
the
past.
2.
Tell
students
the
structure
of
the
past
continuous
tense:
Structure（结构）：S+
was
/
were
+
v.-ing
S+
wasn’t
/
weren’t+
v.-ing
Was
/
Were
+S+
v.-ing
3.
Tell
students
the
differences
between
the
present
continuous
tense
and
the
past
continuous
tense:
Present
continuous
tense:
am/is/are
+
doing
Past
continuous
tense:
was/were+
doing
4.
Explain
the
concept
of
the
past
continuous
tense:
表示过去某一时刻正在进行的动作以及过去某一时间内持续进行的动作,常与表示过去的具体时间的词如：at
that
time，at
this
time
yesterday，
at
9
last
night
,
at
that
moment
等连用。或者在when,
while,
as引导的时间状语从句中使用。
5.
Learn
the
rules
for
changing
the
present
participle
of
the
verb:
※大多数动词直接加-ing
※以不发音的e结尾的动词，去e加-ing
※重读闭音节要双写结尾的辅音字母加-ing
※以ie结尾的把ie变成y再加-ing
6.
Exercises.
Change
the
verbs
into
v.-ing
answer
come
borrow
run
begin
change
buy
celebrate
chat
cut
keep
drink
carry
think
write
practise
win
shop
exercise
dance
swim
lie
see
Step
4
Practice
1.
Give
students
2
minutes
to
fill
in
the
blanks
on
Page
97.
2.
Check
the
answers
with
students.
Answers:(1)was
reading
(2)were,
doing
(3)
was
having
(4)was
walking
(5)Were,
waiting
(6)was
ringing
3.
Circle
some
important
phrases
and
sentences
in
this
part
and
explain
them
one
by
one.
on
the
other
side
of
the
road
wait
for
a
taxi
because
of
break
down
What
a
terrible
snowstorm!
I
saw
you
and
your
parents
standing
on
the
other
side
of
the
road.
Step
5
Lead-in
1.
Show
students
some
pictures
and
sentences.
(1)I
was
sleeping
when
the
earthquake
started.
(2)People
were
running
in
all
directions
while
pieces
of
glass
and
bricks
were
falling
down.
(3)As
I
was
trying
to
find
my
way
out,
I
suddenly
heard
some
noise
above
me.
Tell
them
that
“I
was
sleeping”isthe
main
clause,
“when
the
earthquake
started”
is
adverbial
clause.
Then
ask
students
to
find
the
main
clause
and
adverbial
clause
in
the
other
two
sentences.
2.
More
examples.
Give
more
sentences
with
past
continuous
tense
with“while”,“when”and
“as”.
Circle
conjunction(连词)and
the
parts
of
long
actions
and
short
actions.
The
man
was
riding
a
bike
while
the
building
was
falling
down.
Asthe
girl
was
trying
to
find
her
way
out,
the
two
men
found
her.
The
boy
was
smiling
when
they
saved
him
successfully.
Step
6
Presentation
1.
Consolidation.
Do
some
exercises
to
consolidate
it.
When
the
telephone
rang,
they
were
reading.
When/While/As
they
were
reading,
the
telephone
rang.
While
he
woke
up,
it
was
eight
o’clock.
×
When
he
woke
up,
it
was
eight
o’clock.
√
When/While/As
I
was
waiting
for
a
bus,
I
met
her.
√
2.
Work
out
the
rules
and
do
some
exercises.
(1)当连接同时发生的两个持续性的长动作时，常用while引导。
e.g.
While
I
was
watching
TV,
he
was
listening
to
music.
Millie
was
reading
a
book
while
Eddie
was
sleeping.
The
baby
was
sleeping
while
the
mother
was
cooking.
While
the
baby
was
sleeping,
the
mother
was
cooking.
The
boys
were
playing
football
while
the
girls
were
chatting.
While
the
boys
were
playing
football,
the
girls
were
chatting.
(2)如果主句表示短暂性的动作时，我们可以用when,
while
或
as
引导从句。
e.g.
When/while/as
Millie
was
watching
TV,
Andy
came
into
the
room.
(3)如果主句表示持续性的动作时，我们经常用when
来引导从句。
e.g.
Millie
was
watching
TV
when
Andy
came
into
the
room.
When
the
telephone
rang,
they
were
watching
TV.
When/While/As
they
were
watching
TV,
the
telephone
rang.
When/While/As
the
old
man
was
drinking
tea,
someone
knocked
at
the
door.
When
someone
knocked
at
the
door,
the
old
man
was
drinking
tea.
(4)如果两个短暂性的动作同时发生，我们通常用as
连接。
e.g.
As
Millie
sat
down
on
the
sofa,
Andy
came
into
the
room.
注:当一个短暂性动作发生的同时伴随着一个延续性的动作，这时我们通常用过去进行时来表示延续性的动作，用一般过去时来表示短暂性的
动作。
(5)Summary:
when,
while和as的用法。
①延续性动作+while+延续性动作:
从句为延续性动作,
用when,
while或as。
②延续性动作+短暂性动作:
从句为短暂性动作,
用when。
Note:
延续性动作用was/were+doing
短暂性动作用did
Step
7
Practice
1.
Group
work.
(1)
Give
some
phrases
and
ask
students
to
make
sentences
with
“while,
when,
as”.
(2)
Choose
some
students
to
share
their
sentences.
(3)
Fill
in
the
blanks
using
while/when/as.
①Some
students
were
talking
loudly
__________
the
teacher
came
into
the
classroom.
②
__________
I
was
drawing
a
picture,
they
were
sitting
on
the
grass.
③It
began
to
rain_____________
we
were
having
dinner.
④I
was
walking
in
the
street
__________he
called
me.
⑤______________
we
were
reading,
a
child
came
in.
Answers:
①when
②While
③while/when/as
④when
⑤When/While/As
2.
Complete
the
sentences
with
the
correct
forms
of
the
verbs
in
brackets.
Use
when,
while
or
as
to
connect
the
sentences.
Then
check
the
answers
with
students.
(Playing
in
the
snow
on
Page
98)
Answers:
1.When,
arrived,
was
getting
2.While,
were
building,
was
taking
3.fell,
when/while/as,
was
making
4.was
hiding,
when,
hit
5.When/While/As,
were
playing,
ran
Step
8
Homework
1.
Write
down
your
friends’
activities
last
Sunday
afternoon.
2.
Finish
the
exercises
in
Workbook.
当堂达标
Ⅰ.
用所给单词的适当形式填空。
1.
We
______________(mop)
the
floor
while
they_____________(play)
games
at
that
time.
2.
—______
you
_______
(make)
a
snowman
this
time
yesterday
?
—No,
we
_____________.
3.
My
sister
with
her
classmates
_____________(take)
photos
from
2
to
3
yesterday
afternoon.
4.
_________
they
___________(discuss)
the
problem
with
each
other
when
the
teacher
___________(come)
in
?
5.
—When
________
you
___________(see)
Tom
?
—I
__________
(see)
him
while
I
______________(get)
off
the
train.
Ⅱ.
用when,
while或as填空。
1.
My
wallet
dropped
on
the
ground
_____________
I
was
running.
2.
____________
I
was
falling
asleep,
there
was
a
loud
knock
on
the
door.
3.
_____________
he
was
reading,
an
earthquake
started.
4.
Were
the
students
listening
to
the
teacher
carefully
_________________
the
teacher
was
giving
a
lesson?
5.
_____________the
telephone
rang,
I
became
nervous.
Ⅲ.
完成句子。
1.
昨天晚上迈克来的时候我正在做家庭作业。
I
_____________
my
homework
when
Mike
__________
last
night.
2.
安迪正在看电视时，她父亲回来了。
While
Andy
________________TV,
her
father
_____________home.
3.
我敲门的时候你在干什么？
What
were
you
doing
__________
I
___________
at
the
door
?
4.
我去看她的时候，她不是在打扫房间。
She
__________________the
room
when
I
_________to
see
her.
5.
小姑娘们一边走，一边唱。
The
little
girls
____________
as
they
_____________.
Answers:
Ⅰ.
1.were
mopping,
were
playing
2.
Were,
making,
weren’t
3.
was
taking
4.
Were,
discussing,
came
5.
did,
see,
saw,
was
getting
Ⅱ.
1.
while/when/as
2.
When/While/As
3.
When/While/As
4.
while
5.
When
Ⅲ.
1.
was
doing,
came
2.
was
watching,
came
back
3.
when,
knocked
4.wasn’t
cleaning,
went
5.
sang,
walked
板书设计
Unit
8
Natural
disasters
GrammarNew
words
and
Phrases
break
break
down
on
the
side
of
the
road
过去进行时：
S+
was
/
were
+
v.-ing
S+
wasn’t
/
weren’t+
v.-ing
Was
/
Were
+S+
v.-ing
when,
while和as的用法
1.延续性动作+while+延续性动作
2.短暂性动作+as+短暂性动作
①从句为延续性动作，用when,
while或as
②从句为短暂性动作，用when
Note:
延续性动作用was/were+doing
短暂性动作用did
教学反思
21世纪教育网(www.21cnjy.com)(共48张PPT)
Unit
8
Natural
Disasters
Grammar
2020年秋牛津译林版英语八年级上册精品课件
学
习
目
标
学习本课时新单词及短语：break,
break
down,
on
the
side
of
the
road
1
3
学会使用when,
while和as。
学会使用过去进行时。
2
He
play
basketball.
is
ing
课
堂
导
入
He
is
playing
basketball.
否定句：
一般疑问句：
He
isn't
playing
basketball.
Is
he
playing
basketball?
They
play
with
a
yo-yo.
are
ing
They
are
playing
with
a
yo-yo.
否定句：
一般疑问句：
They
aren't
playing
with
a
yo-yo.
Are
they
playing
with
a
yo-yo?
对划线部分提问：
What
are
they
playing
with?
She
water
the
flowers.
is
ing
She
is
watering
the
flowers.
否定句：
一般疑问句：
She
isn't
watering
the
flowers.
Is
she
watering
the
flowers?
对划线部分提问：
Who
is
watering
the
flowers?
They
were
doing
morning
exercises
at
9:05
yesterday
morning.
课
堂
学
习
They
were
doing
morning
exercises
at
9:05
yesterday
morning.
否定句：
They
weren't
doing
morning
exercises
at
9:05
yesterday
morning.
一般疑问句：
Were
they
doing
morning
exercises
at
9:05
yesterday
morning?
Yes,
they
were.
No,
they
weren't.
They
were
playing
basketball
at
this
time
last
Sunday.
Were
they
playing
basketball
at
this
time
this
Sunday?
否定句：
一般疑问句：
对划线部分提问：
They
weren't
playing
basketball
at
this
time
this
Sunday.
They
were
playing
basketball
at
this
time
this
Sunday.
When
were
they
playing
basketball?
from
10
to
10:30
yesterday
morning.
She
was
reading
a
newspaper
否定句：
一般疑问句：
对划线部分提问：
She
was
reading
a
newspaper
from
10
to
10:30
yesterday
morning.
She
wasn't
reading
a
newspaper
from
10
to
10:30
yesterday
morning.
Was
she
reading
a
newspaper
from
10
to
10:30
yesterday
morning?
When
was
she
reading
a
newspaper?
Past
continuous
tense
To
talk
about
things
that
happened
at
a
particular
time
in
the
past.
过去的特定时间
at
8:00
yesterday
morning
last
Sunday
afternoon
when
the
earthquake
started
Structure（结构）
S
+
was
/
were
+
v.-ing
wasn’t
/
weren’t+
v.-ing
Was
/
Were
+
S
+
…
?
v.-ing
S
+
过去进行时
Past
continuous
tense
was/were+
doing
现在进行时
Present
continuous
tense
am/is/are
+
doing
过去进行时的基本用法
表示过去某一时刻正在进行的动作以及过去某一时间内持续进行的动作,常与表示过去的具体时间，如：at
that
time，at
this
time
yesterday，
at
9
last
night
,
at
that
moment
等连用。
或者在when,
while,
as引导的时间状语从句中使用。
※
大多数动词直接加ing
※
以不发音的e结尾的动词，去e加ing
重读闭音节要双写结尾的辅音字母加ing
动词的现在分词
※
Change
the
verbs
into
v.-ing
answer
come
borrow
run
begin
change
buy
celebrate
chat
cut
keep
drink
carry
think
write
practise
win
shop
exercise
dance
swim
lie
see
ing
ing
ing
ing
ing
ing
ing
ing
ing
ing
ing
ing
ing
ing
ning
ning
ning
ting
ting
ming
ping
ying
ing
was
reading
were
doing
was
having
was
walking
Were
waiting
was
ringing
was
ringing
saw
Sandy
was
watching
flowers
happened
longer
actions
shorter
actions
I
was
sleeping
when
the
earthquake
started.
People
were
running
in
all
directions
while
pieces
of
glass
and
bricks
were
falling
down.
As
I
was
trying
to
find
my
way
out,
I
suddenly
heard
some
noise
above
me.
main
clause主句
adverbial
clause状语从句
The
man
was
riding
a
bike
while
the
building
was
falling
down.
As
the
girl
was
trying
to
find
her
way
out,
the
two
men
found
her.
The
boy
was
smiling
when
they
saved
him
successfully.
conjunction(连词）
longer
action
longer
action
longer
action
longer
action
shorter
action
Past
continuous
tense
with
‘while’
,
‘when’
and
‘as’
shorter
action
_____
the
telephone
,
they
.
When
rang
were
reading
_____________
they
were
reading,
the
telephone
rang.
When/While/As
True
or
False
While
he
woke
up,
it
was
eight
o’clock.
2.
When/While/As
I
was
waiting
for
a
bus,
I
met
her.
×
√
while指某一段时间，从句中的谓语动词必须是延续性的；
when既可指某一段时间，也可指某一点时间，从句中的谓语动词可是延续性的，也可是短暂性的。
When
he
woke
up,
it
was
eight
o'clock.
Work
out
the
rules
While
+过去进行时，过去进行时。
延续性动词
When
+一般过去时，
过去进行时。
瞬间性动词
When/While/As
+过去进行时，一般过去时。
延续性动词
延续性动词
延续性动词
瞬间性动词
1.
当连接同时发生的两个持续性的长动作时，常用while引导。
While
I
was
watching
TV,
he
was
listening
to
music.
Millie
was
reading
a
book
while
Eddie
was
sleeping.
The
baby
was
sleeping
the
mother
was
cooking.
at
6
in
the
morning
while
While
the
baby
was
sleeping,
the
mother
was
cooking.
The
boys
were
playing
football
the
girls
were
chatting.
at
4
last
Friday
afternoon
while
While
the
boys
were
playing
football,
the
girls
were
chatting.
2.
如果主句表示短暂性的动作时，我们可用when,
while
或
as
引导从句。
When/while/as
Millie
was
watching
TV,
Andy
came
into
the
room.
3.
如果主句表示持续性的动作时，我们经常用when
来引导
从句。
Millie
was
watching
TV
when
Andy
came
into
the
room.
the
telephone
rang,
they
were
watching
TV.
When/While/As
they
were
watching
TV,
the
telephone
rang,
When
When
someone
knocked
at
the
door,
the
old
man
was
drinking
tea.
the
old
man
was
drinking
tea,
someone
knocked
at
the
door.
While/When/As
4.
如果两个短暂性的动作同时发生，我
们通常用as
连接。
e.g.
As
Millie
sat
down
on
the
sofa,
Andy
came
into
the
room.
注：当一个短暂性动作发生的同时伴随
着一个延续性的动作，这时我们通
常用过去进行时来表示延续性的动
作，用一般过去时来表示短暂性的
动作。
when,while和as的用法
延续性动作+while+延续性动作
延续性动作+短暂性动作
①从句为延续性动作，用when,while或as
②从句为短暂性动作，用when
Note:延续性动作用was/were+doing
短暂性动作用did
Mrs
Green
cook
dinner
water
the
flowers
wash
the
dishes
watch
TV
her
children
watch
news
play
chess
mop
the
floor
read
newspapers
while
Group
work
Sam;
run
the
students;
talk
happily
Peter;
call
his
friend
Nancy;
fly
a
kite
he;
fall
over
the
teacher;
come
in
the
doorbell;
ring
it;
begin
to
rain
as/while/when
My
mother;
leave
home
the
teacher;
come
in
the
bus;
crash
into
a
tree
I;
sleep
we;
chat
Sandy;
listen
to
music
when
1.Some
students
were
talking
loudly
_____the
teacher
came
into
the
classroom.
2.
______I
was
drawing
a
picture,they
were
sitting
on
the
grass.
3.It
began
to
rain_____________we
were
having
dinner.
4.I
was
walking
in
the
street______he
called
me.
5.______________
we
were
reading,
a
child
came
in.
when
While
while/when/as
when
When/While/As
Practice
Class
1
Grade
8
students
went
to
play
in
the
snow.
arrived
was
getting
some
snow
from
the
ground
were
building
a
snowman
was
making
a
big
snowball
fell
over
was
hiding
behind
a
tree
hit
him
was
taking
photos
ran
towards
them
When
arrived
was
getting
When/While/As
were
building
was
taking
fell
when/while/as
was
making
was
hiding
when
hit
When/While/As
were
playing
ran
I.
用所给动词的适当形式填空
We
______________(
mop
)
the
floor
while
they
___________
(
play
)
games
at
that
time.
2.
—______
you
_______
(
make
)
a
snowman
this
time
yesterday?
—No,
we
_____________.
3.
My
sister
with
her
classmates
_____________(
take
)
photos
from
2
to
3
yesterday
afternoon.
4.
_________
they
___________(
discuss
)
the
problem
with
each
other
when
the
teacher
___________(
come
)
in
?
5.
—When
________
you
___________(
see
)
Tom
?
—I
__________
(
see
)
him
while
I
______________(
get
)
off
the
train.
were
mopping
were
playing
Were
making
weren’t
were
taking
Were
discussing
came
did
see
saw
was
getting
课
堂
达
标
II.
用when,
while或as填空
My
wallet
dropped
on
the
ground
_____________
I
was
running.
2.
____________
I
was
falling
asleep,
there
was
a
loud
knock
on
the
door.
3.
_____________
he
was
reading,
an
earthquake
started.
4.
Were
the
students
listening
to
the
teacher
carefully
________
the
teacher
was
giving
a
lesson?
5.
_________
the
telephone
rang,
I
became
nervous.
when/while/as
When/While/As
When/While/As
while
When
Ⅲ.完成句子
1.
昨天晚上迈克来的时候我正在做作业。
I
____________
my
homework
when
Mike
______
last
night.
2.
安迪正在看电视时，她父亲回来了。
While
Andy
_____________TV,
her
father
___________home.
3.
我敲门的时候你在干什么？
What
were
you
doing
________I
___________
at
the
door?
4.
我去看她的时候，她不是在打扫房间。
She
_______________the
room
when
I
________
to
see
her.
5.
小姑娘们一边走，一边唱。
The
little
girls
________
as
they
________.
was
doing
came
was
watching
came
back
when
knocked
wasn’t
cleaning
went
sang
walked
Write
down
your
friends’
activities
last
Sunday
afternoon.
2.
Finish
the
exercises
in
Workbook.
Homework
Thank
you
!
谢谢
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