Mary plays football,? is she?
doesn't she?
don't she?

You can't tell the difference,?

can't you
do you?
can you?

these are all different formats for citing your sources in a research paper. mla stands for modern language association. apa stands for american psychological association. cms stands for the chicago manual of style.

the purpose of a nonfiction text is to give the text a rap up. for example, when i say : frogs are interesting animals is an ending. then when i say: frogs are unique in different ways. that is an intro.