N4 — outside your level filter
Is said whole, with nothing composed onto it and takes no だ／です, so there are no forms to conjugate.
仲がいい
nakagaiito be on good termsN4expression
Example sentences2
姉と妹はとても仲がいいです。
ane to imouto wa totemo naka ga ii desu.
The older and younger sisters are on very good terms. neutral
あの二人、相変わらず仲がいいね。
ano futari, aikawarazu naka ga ii ne.
Those two are as close as ever, aren't they. casual