我係咪你先啦返嚟啦
I’m the one, you go back first

Cantonese Sentence Breakdown

我 ngo5
I
me
my
us
we
our
self
係咪 hai6 mai6
used in asking questions in conversations, similar to saying "is it ….?"; "Isn't it?"
"Yes or no?"
你 nei5
you (informal, as opposed to courteous 您nín [您])
can be used to refer to an unspecified person
先 sin3
early
prior
former
in advance
first
for now
ancestor
pioneering
only then
啦 la5
“now”, with an connotation of doubt
surprise
disapproval
返嚟 faan2 lai2
come back here (spoken)