关键词不能为空

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作者:高考题库网
来源:https://www.bjmy2z.cn/gaokao
1970-01-01 08:00
tags:

-

2021年1月23日发(作者:inspiration)

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:


be

be

,









be

提前








Is he a student?

can


can








can
提前








Can you fly a kite?

must


must





must

提前






Must you leave now?




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


)


be

be

,








be
后要把
not



can


can






can
后要把
not



must


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?













do



does




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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