～ばかりでなく— Not Only, But Also

• 子供ばかりでなく、大人もこのゲームを楽しんでいる。

  Kodomo bakari de naku, otona mo kono geemu o tanoshinde iru.

  Not only children but also adults enjoy this game.

  ばかりでなく adds adults alongside children

• 彼は勉強ができるばかりでなく、スポーツも得意だ。

  Kare wa benkyou ga dekiru bakari de naku, supootsu mo tokui da.

  He is not only good at studying, but also good at sports.

  ばかりでなく connects two positive qualities

• この薬は頭痛ばかりでなく、腹痛にも効く。

  Kono kusuri wa zutsuu bakari de naku, fukutsuu ni mo kiku.

  This medicine works not only for headaches but also for stomachaches.

  ばかりでなく extends the scope to a second symptom

• ・Register: slightly formal but widely usable in speech and writing.
• ・The second clause commonly takes も ('also').
• ・Interchangeable with だけでなく in most cases.

Commonly confused with

The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones ～ばかりでなく is tested against.

• ～こそ — This Is The One
• ～ことか — How Very ...!
• ～ことに(は) — To My Surprise
• さえ — Even That Much
• ～てしょうがない／～てしかたがない — Unbearably So
• ～てたまらない — More Than One Can Bear
• ～てならない — Can't Help Feeling
• ～てばかりいる — Doing Nothing But