本ほん を 買かいません でした か?hon o kaimasen deshita ka?Didn't you buy a book?Breakdown of hon o kaimasen deshita ka?ですdesuto be本ほんhonbookかkaquestion particle買かうkauto buyをodirect object particleElon.io is an online learning platformWe have hundreds of Japanese lessons and thousands of exercises.Start learning Japanese nowNihon-shiki romanizationwatasi ha tyuugoku kara kimasitaHepburn romanizationwatashi wa chuugoku kara kimashita