N5 — 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.
へえ
heeoh reallyN5expression
Example sentences2
へえ、そうなんですか。
hee, sou nan desu ka.
Oh really, is that so? neutral
へえ、知らなかったよ。
hee, shiranakatta yo.
Oh really, I didn't know that. casual