但係如果有選擇嘅話，我係會想留番長嘅
but if I had the choice, I would want to keep it long

Cantonese Sentence Breakdown

但係 daan6 hai6
(conjunction) but
如果 jyu4 gwo2
if
有 jau6
also
again
選擇 syun2 zaak6
to choose
嘅話 ge3 waa2
as said
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
會 wui6
a moment (Taiwan pr. for this sense is [huǐ])
metropolitan
gatherings union
to meet
to catch up
想 soeng2
to think
to believe
to suppose
to wish
to want
to miss (feel wistful about the absence of sb or sth)
to plan
留番 lau4 faan1
(verb) keep; Maintain
長 zoeng6
extraneous
嘅 koi3
indignant
generous
to sigh (with emotion)