= This phrase =
どうして笑っているの?
Dooshite waratte iruno?
(Why are you laughing?)
どうして笑っているの?
Dooshite waratte iruno?
(Why are you laughing?)
トム
どうして笑っているの?
Dooshite waratte iru no?
— Why are you laughing?
casual expression (family,friend)
■なんで笑ってるの?
Nande waratteru no?
— Why are you laughing?
Nande waratteru no?
— Why are you laughing?
■なにを笑っているの?
Nani o waratte iru no?
— What are you laughing at?
Nani o waratte iru no?
— What are you laughing at?
polite expression
■どうして笑っているのですか?
Dooshite waratteiru no desu ka?
— Why are you laughing?
Dooshite waratteiru no desu ka?
— Why are you laughing?
other expressions
■なにが可笑しいの?
Nani ga okashii no?
— What is funny?
Nani ga okashii no?
— What is funny?
■なにがそんなに面白いの?
Nani ga sonnani omoshiroi no?
— What is so funny?
Nani ga sonnani omoshiroi no?
— What is so funny?
■それのどこが面白いの?
Sore no doko ga omoshiroi no?
— What’s so interesting about that?
Sore no doko ga omoshiroi no?
— What’s so interesting about that?