Question

怎样把肯定句变成否定句和疑问句

Answer 1

否定句：在谓语动词前加助动词don't，如果是第三人称单数作主语，则在谓语动词前加doesn't；如果是系动词be，则根据人称，直接说aren't
或isn't。如：
we
go
to
school
every
day.改为否定句为：
we
don't
go
to
school
every
day.
he
goes
to
school
every
day.
改为否定句：
he
doesn't
go
to
school
every
day.
we
are
workers.
改为否定句：
we
aren't
workers.
he
is
a
student.改为否定句：he
isn't
a
student.
i
am
a
student.改为否定句：i'm
not
a
student.
一般疑问句：把助动词或系动词be放于句首。如：
does
he
go
to
work
every
day?
do
you
go
to
work
every
day?
is
he
a
student?
are
you
workers?
/
are
you
a
worker?
不知对你是否有帮助？

Answer 2

肯定句只能改成双重否定句才能保证句子意思不变，只要在句子中加上“不得不”或者是“没有不”。
肯定句还能改成反问句，保证句子意思不变，比如：我不能迟到，就变成了
我怎么能迟到？或者是
难道我能迟到吗？
即将句子中的表示肯定的动词变成否定的，将便是否定动词变成肯定的，再在句子前面加上”难道或者怎么“，在句子后面加上”吗或者呢“。