To asking about reason we use why
Benar
_____ did you go yesterday?
where
____ did she arrive last night?
When
To asking about ways or procedure we use when
false
_____ help you with your homework?
Who
_____did you laugh in the class?
Why
A: ______ is that ?. B: It's a bag.
What
A:_____ is she? B: She is my sister, her name is Tika.
Who
