-
Unit3
I am doing
(
现在进行时
)
A
现在进行时的形式为
:
am/is/are
+do
ing
< br>/eat
ing
/runn
in
g
/writ
ing
等
.
I
he
she
it
we
you
they
am
(not)
is
< br>(not)
ing
are
(no
t)
?
?
?
?
?
?
I
’
m working.
I
’
m not watching TV.
Maria
is reading
a newspaper.
She
isn
’
t
eating
.(
或
She
’
s not
eating
.)
The phone
is ringing.
We
’
re having
dinner
.
You
’
re not
listening
to
me
.(
或
You
aren
’
t
listening<
/p>
…
)
?
The children
are doing
their homework.
B
am/is/are+-ing
表示“现在正在发生某事”
：
I
’
m
working
she
’
s wearing
a hat
they
’
re
playing
football
I
’
m not
watching
television
过去
现在
将来
?
Please be quiet.
I
’
m
working.
(=I
’
m
working now)
?
Look,there
’
s
Sarah. She
’
s wearing
a brown coat.(=she is wearing it now)
?
The weather is
nice. It
’
s not
raining.
?
‘
Where are the
children?
’
‘
They
’
re
playing
in the
park.
’
?
(on the phone)
We
’
re having
dinner now. Can I phone you later?
?
You can turn
off the television.
I
’
m not watching
it.
拼写（参见附录
5
）
com
e
com
ing
writ
e
writ
ing
dance
danc
ing
ru
n
ru
nn
ing
si
t
si
tt
ing
swi
m
swi
mm
ing
l
ie
l
y
ing