(完整版)助动词用法及练习
绝世美人儿
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2021年01月30日 13:22
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-
be
动词,情态动词,助动词
do/does
的用法区别及练习
< br>助动词,顾名思义就是帮助动词
完成疑问及否定
的,本身没有什么含义。主
要的 助动词有
be,do,will,have
等,其用法详述如下:
一、⑴
由连系动词
am
,
is
,
are
构成的句子:变一般疑问句时把
am
,
is
,
are
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?
(2)was
是
am,is
的过去式,
were< br>是
are
的过去式,若句子中有以上两词时,变疑问句及
否定句方法与(
1
)相同。
二、
(1)
由情态动词
can, may,will
,
shall
等构成的句子
:
变一般疑问句时把
can, may,will
,
shall< br>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?
(
2
)
could,might,would,should
是
can,ma y,will,shall
的过去式,若句子中有以上两词时,
变疑问句及否定句方法与(1
)相同。
三、(
1
)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
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 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?
(
2
)
did
是
do
和
did
的过去式,
变一般疑问句时把
did
放在句子前面
.
变否定句时把
didn’t
放在动词的前面
, < br>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都要变回
原型。
四、
(1)
由
have,has
构成的现在完成时句子,
变 一般疑问句时把
have,has
提到句子的前面,
句尾用问号即可。变否定句时直接 在
have,has
后面加
not
即可。例如:
肯定句:
He has read today
’
s newspaper.
一般疑问句
: Has he read today
’
s newspaper.?
否定句
: He has not read today
’
s newspape
画线提问
:
对
he
提问
: Who has read today
’
s newspaper?
对
today
’
s newspaper
提问
: What has he did?
(2)had
是
have
和
has
的过去式,在构成的过去完成时句子中,变一般疑问句时把
had< br>提
到到句子的前面,句尾用问号即可。变否定句时直接在
had
后面加
not
即可。
(3)
若
have,has,had
没有出 现在完成时的句子中,
则当实义动词对待,
请参考实义动词的
用法。
五、第一人称
I
,
we
在变疑问句时,应变为第二人称
you。
“
I am, you /we /they are
”这
是初一最简单的固定搭配,不应再唠叨了吧!
六、< br>is,has,does
用于第三人称的现在时态,
was
用于第三人称的过去 时态。
针对性练习
按要求改写句子:
1.I have been to Beijin(
一般疑问句
)
______ ______ __________ to Beijin?
can see some birds.(
一般疑问句
)
______ ______ see ______ birds?
designs clothes.(
一般疑问句
)
______ he ________ clothes?
were s
ome flowers on the teachers’ desk.(
一般疑问句
)
______ ______ ______ flowers on
the teachers’ desk?
were some apples on the tree.(
否定句
)
There ______ ______ ______ apples on the tree.
6.I think he is very old.(
否定句
)
I ______ think he ______ very old.
colour it green.(
否定句
)
______ ______ colour it green.
had lunch(
变否定句
)
______ _______ ______ __________.
may have some hot dogs.(
一般疑问句
)
_______ ______ ______ ______ ________?.