肯定变否定一般是在be动词后加not,如果没有be动词,就加助动词does
+not,did
not
,变为一般疑问句时候,一般把be动词提前。或者句首加助动词does
/did,特殊疑问句就是特殊疑问词加一般疑问句。例如he
is
a
boy
.-he
is
not
a
boy,he
does/did
homework-he
does
not
do
/did
not
do
homework.
he
likes
reading
books.-what
does
he
like
?
有be动词的把be动词提前;有情态动词的,把情态动词提前;有助动词的把助动词提前;什么都没有的,前面添加
do/does/did,但注意后面的谓语动词必须恢复原形