01 why?                                naze desuka?
02 why?                                dooshite desuka?
03 why not?                            dooshite dame desuka?
*dame=do not, cannot
04 how about?                          doo desuka
05 what to do?                         doo shimasuka?
06 what do you mean(what's meanning)   doo iu imi desuka?
07 what do you call this in english?   sore wa eigo de doo ii-masuka?
08 what is the japanese for "thanks"?  "thanks" wa nihongo de doo ii-masuka?
09 what happened to you?               doo shitan desuka?
10 what shall i do?                    doo shitara iin desuka?
11 what shall i do?                    doo sureba iin desuka?
12 what shall we do?                   doo shima-syooka?