你食咗飯未呀
Have you had your dinner?

Cantonese Sentence Breakdown

你 nei5
you (informal, as opposed to courteous 您nín [您])
can be used to refer to an unspecified person
食 zi6
to feed
咗 zo2
Cantonese particle equivalent to 了le [了] or 过guò [过], a particle used to indicate perfective aspect for continuous state
completed actions
past events
change of situation
飯 faan6
food
cuisine
cooked rice
meal M: 碗wǎn [碗]
顿dùn [顿]
means of living
cigarettes
未 mei6
not yet
呀 haa1
(particle equivalent to 啊 after a vowel, expressing surprise or doubt)