我係呀係呀咁咪一齊
I'm with you.

Cantonese Sentence Breakdown

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
呀 haa1
(particle equivalent to 啊 after a vowel, expressing surprise or doubt)
咁 gam3
so (Cantonese)
Mandarin equivalent: 这样zhèyàng [这样], like this
咪 mui1
sound of cat
cat's meow
一齊 jat1 cai4
(adverb) all together