How to pronounce 偷笑 in Cantonese (2 out of 3):

你為甚麼在這裡偷笑
Why are you smiling here?

Cantonese Sentence Breakdown

nei5
you (informal, as opposed to courteous 您nín [您])
can be used to refer to an unspecified person
wai6
because of
for
on account of
on behalf of
by (in the passive voice)
甚麼 sam6 mo1
what
zoi6
(located) at
(to be) in
to exist
in the middle of doing sth
(indicating an action in progress)
to depend on
to rest with
to be alive
這裡 ze2 lei5
here
偷笑 tou1 siu3
chuckle