助詞N5
〜で
at / by / with / because of
Structure
N + で + V
Explanation
Multi-purpose particle. ① place+で = action at a place; ② tool/means+で = by/with; ③ cause+で = because of. Contrast に for existence.
Examples
図書館で本を読みます。
I read books at the library.
はしでご飯を食べます。
I eat with chopsticks.
Note
で for action location (dynamic), に for existence (static): 公園で遊ぶ vs 公園にいる.