When to use ください (kudasai) or お願いします (onegaishimasu) in requests? After the particle "o" を, for example when ordering food: "水をください" (Mizu o kudasai - Please, water ); When asking something that involves an action, along with the verb in the -te form, like: "ちょっと待ってください" (Chotto matte kudasai - Please, wait ) Note: do not use onegaishimasu here