The particle "de" has a few ways to use. "at" or "with" or "by" ...etc. 1. For meaning the location Ex. resutoran de hataraku = work at a restaurant ie de benkyousuru = study at home 2. For meaning a tool, vehicle Ex. densha de iku = go by train jitensha de iku = go by bicycle fooku de taberu = eat *** with a fork 3. For meaning materials Ex. kami de tsukuru = make *** with paper

Ex. Fork de tabeta. I ate it with a fork. http://en.wikipedia.org/wiki/Japanese_particles#de http://japanese.about.com/library/weekly/aa091601a.htm