How to pronounce 走先 in Cantonese (7 out of 8):

但係點解《走先啦,係咁先啦》
But why do you go ahead?

Cantonese Sentence Breakdown

但係 daan6 hai6
(conjunction) but
點解 dim2 gaai2
(pronoun) why; how to explain; how come;
走先 zau2 sin1
leave first
la5
“now”, with an connotation of doubt
surprise
disapproval
hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
gam3
so (Cantonese)
Mandarin equivalent: 这样zhèyàng [这样], like this
sin3
early
prior
former
in advance
first
for now
ancestor
pioneering
only then