だけでなくNot only A, but also B
だけでなく says that a statement does not stop with A and adds B: “not only A, but also B.” B can simply be another relevant fact; it does not have to be more surprising than A.
How the two parts fit together
Attach だけでなく to A, then state the added item or fact B. The two sides should be parallel enough to belong under one larger statement. The added B is often marked with も, which makes the “also” relationship especially clear.
Nouns and clauses
When the added part has no explicit marker
も is common but not compulsory. It can be omitted when the parallel structure already makes the addition unmistakable.
Adjectives
Choosing among close alternatives
だけでなく is the broadly useful everyday choice. ばかりでなく is a somewhat more formal close equivalent, while のみならず is strongly associated with formal writing. Use ばかりか when B is presented as a stronger or more surprising extension; ordinary だけでなく does not require that escalation.
More examples
このアプリは便利なだけでなく、使い方も分かりやすい。
This app is not only convenient but also easy to use.
Analyze姉は料理するだけでなく、パンも焼く。
My older sister not only cooks but also bakes bread.
Analyzeその映画は子どもだけでなく、大人にも人気がある。
That movie is popular not only with children but also with adults.
Analyze兄は肉を食べないだけでなく、魚も食べない。
My older brother eats neither meat nor fish.
AnalyzeLiterally: My older brother not only does not eat meat; he also does not eat fish.
この仕事は経験が必要なだけでなく、時間もかかる。
This job requires not only experience but also time.
Analyze彼は以前、教師だっただけでなく、校長も務めていた。
He was formerly not only a teacher but also a principal.
Analyze