我係噉認為
I think so.

Cantonese Sentence Breakdown

我 ngo5
I
me
my
us
we
our
self
係噉 hai6 gam2
be this way, like this; that's it, that's all
認 jing6
to recognize
to know
to admit
to understand
to enter into a certain relationship with
to offer to do something
為 wai6
because of
for
on account of
on behalf of
by (in the passive voice)