写出下列各词的相应形式

on(反义词) off
no(同音词) know
desk(近义词) table
take(对应词) give
don't(完全形式) do not
they are(缩写形式) they're
where is(缩写形式) where's
is(复数形式) are
math book(复数形式) math books
are not(缩写形式) aren't