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.
申し訳ありません
moushiwakearimasenI'm very sorryN4expression
Example sentences2
ご迷惑をおかけして申し訳ありません。
go meiwaku o okake shite moushiwake arimasen.
I'm very sorry for the trouble I've caused. formal
宿題を忘れてしまって、申し訳ありません。
shukudai o wasurete shimatte, moushiwake arimasen.
I'm very sorry, I forgot to do my homework. neutral