で
(De)
marks the means, tool, or location of an action.
Connection rules
- +Noun + で + action verb
- +Location: use で for where an action happens, に for where something exists.
- +Also used to mark quantity/limit (五千円で買う — 'buy for 5,000 yen').
Examples
1.
バスで学校に行きます。

Basu de gakkou ni iki masu.
I go to school by bus.
「marks the means, tool, or location of an action」
2.
図書館で勉強します。

Toshokan de benkyou shi masu.
I study at the library.
「marks the means, tool, or location of an action」
Practice
I eat dinner with chopsticks.
___晩ご飯を食べます。
Romaji also accepted