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2021年1月30日发(作者：吾之樊哙)
v1.0
可编辑可修改

be
动词，情态动词，助动词
do/does
的用法区别及练习

1.

由连系
am
，
is
，
are
构成的句子：变
一般疑问句
时把
am
，
is
，
a re
提到句子的前面，句
尾用问号即可。变
否定句
时直接在
am，
is
，
are
后面加
not
即可。例如：


肯定句
:He is a student.
一般疑问句
: Is he a student
？

否定句
: He is not a student.
画线提问
:

对
he
提问
: Who is a student
？

对

a student

提问
: What is he or What does he do


2.

由情态动词
can, may, should
等构成的句子
:

变
一般疑问句
时把
can,may,
提到句子的
前面
,
句尾用问号即可
.
变否 定句时直接在
can,may,
后面加
not
即可
.

例如
:
肯定句
: She can swim.
一般疑问句
: Can she swim
？

否定句
: She can not swim.
画线提问
:

对
she
提问
: Who can swim
？

对
swim
提问
: What can she do


3.

由行为动词构成的句子
:

需要加助词
do
或
does.

变
一般疑问句时把
do/does
放在句子
前面
.

变否定句时把< br>don’t/doesn’t
放在动词的前面。要注意观察动词的形式并对号入
座。一般 疑问句和否定句的动词三单式都要变回原型。

play-----do plays-----does



例如
:
肯定句
: They play football after school.
He plays football after school.

一般疑问句
: Do they play football after school
Does he
play
football after
school
？

否定句
:
They
don't
(do
not)
play
football
after
school.

He
doesn’t’

play
football
1
v1.0
可编辑可修改

after school.

画线提问
:

对
they/he
提问
: Who plays football after school
对
play football
提问
: What do they do after school

What does he
do
after school
？

对
after school
提问
: When do they play football

When does he
play
football



针对性练习

按要求改写句子：

know the answer.(
一般疑问句
)










______ ______ __________the answer
？

can see some birds.(
一般疑问句
)


______ ______ see ______ birds
？

designs clothes.(
一般疑问句
)



______ he ________ clothes
？


are some flowers on the teachers’ desk.(一般疑问句
)

______ ______ ______ flowers on the teachers’ desk？

are some apples on the tree.(
否定句
)
There ______ ______ ______ apples on the tree.
think he is very old.(
否定句
)
I ______ think he ______ very old.
colour it green.(
否定句
)
______ ______ colour it green.
doctors are helpful.(
变否定句
)
______ _______ ______ __________.
may have some hot dogs.(
一般疑问句
)
_______ ______ ______ ______ ________.

aren’t any pears in the box.(同义句
)
There are ______ pears in the box.
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