N2 — outside your level filter
Modifies the end of the sentence directly and takes no だ／です, so there are no forms to conjugate.
まして
mashitemuch less, let aloneN2adverb
Example sentences2
大人でも難しいのだから、まして子供にできるはずがない。
otona demo muzukashii no dakara, mashite kodomo ni dekiru hazu ga nai.
It's difficult even for adults, so there's no way a child could do it. neutral
平日でも混んでるのに、まして週末は無理だよ。
heijitsu demo konderu noni, mashite shuumatsu wa muri da yo.
It's crowded even on weekdays, let alone on weekends — no way. casual