-
助动词
do
& does
1.
把句子变为一般疑问句:
(
变疑问,很简单,要把
…
.
提到前
)
用法:
有
be
找
be
,
把
be
提前
Is he a student?
有
can
找
can
,
把
can
提前
Can you fly a kite?
有
must
找
must
,
把
must
提前
Must you leave now?
(
有
will/would/could/ should
等,直接提前
)
2.
把句子变为否定句:
(
变否定很简单
,
be
后要把
not
添
)
有
be
找
be
,
be
后要把
not
添
有
can
找
can
,
can
后要把
not
添
有
must
找
must
,
(
看情况用
mustn
’
t
还是
needn
’
t)
3.
当句子里没有
be
动词
,
没有
can, must, will
等情态动词,
怎么
办?
找
do
或
does
来
帮忙提问,
否定
1)
We like playing football.
Do you like playing football?
We don
’
t like playing football.
2)
He likes playing football.
Does he like playing football?
He doesn
’
t like playing football.
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