shall is are do does 写出否定形式的缩写形式
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shall is are do does 写出否定形式的缩写形式
shall is are do does 写出否定形式的缩写形式
shall is are do does 写出否定形式的缩写形式
shan't
isn't
aren't
don't
doesn't
shan't
isn't
aren't
don't
doesn't
shall not=shan't
is not=isn't
are not=aren't
do not=don't
does not=doesn't
shan't
isn't
aren't
don't
doesn't