但係我係一時時
But I was a moment.

Cantonese Sentence Breakdown

但係 daan6 hai6
(conjunction) but
我 ngo5
I
me
my
us
we
our
self
係 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
一時時 jat1 si4 si4
sometimes