de (で) is often used to specify places. (e.g.at) For example, I met with him at the store, would be; 私は彼と店で会った わたしは　かれと　みせで　あった watashi wa kare to mise de atta Also it is used to specify tool. (e.g.with) For example, I drew a picture with the color pencil, would be; 私はその色鉛筆で絵を描いた わたしは そのいろえんぴつで えを かいた watashi wa sono iroenpitsu de e wo kaita I hope it helps.