The dictionary form of a verb, followed by the phrase bakari de naku ... (mo) ("not only ... but also ...") is used to make an additional statement about the statement of the sentence, and to deny that what is stated in the first part of the sentence (up until bakari) is the entire truth.
NOTE: The ta form should be used in place of the dictionary form before bakari if one is speaking about past actions or events (example 3).
Kanojo wa piano o hiku bakari de naku sakkyoku mo shimasu.
She not only plays the piano, but also composes.
Ano hito wa yoku taberu bakari de naku yoku nomu.
He not only eats a lot but drinks a lot.
Kyō wa kaimono o shita bakari de naku eiga mo mimashita.
Today, not only did I do some shopping, I also saw a movie.
Hope this helps!
°˖ ✧◝(○ ヮ ○)◜✧˖ °こゆうきあいはら°˖ ✧◝(○ ヮ ○)◜✧˖ °