嗯！剛才4A班真的表演得非常之好呀，啊J
Yeah! Class 4A really performed very well just now, ah J

Cantonese Sentence Breakdown

嗯 ng6
(a groaning sound)
剛才 gong1 coi2
just now
班 baan1
team
class
squad
work shift
ranking M: 个gè [个]
classifier for groups, scheduled runs
flights
a surname
to spread about
to manoeuvre
to withdraw (troops)
group
to gather support
to collect
to deploy one's gang member
真的 zan1 dik1
yes
real
表演 biu2 jin2
performance
得 dak1
structural particle: used after a verb (or adjective as main verb), linking it to following phrase indicating effect, degree, possibility etc
to obtain
to acquire
to get
to gain
suit
proper
ready
finished
to be satisfied
to permit
to need to
to have gone as far as to
to have even done
can
非常之 fei1 soeng4 zi1
very
好 hou3
to like
to love
to be fond of
to be liable to
to be likely to
呀 haa1
(particle equivalent to 啊 after a vowel, expressing surprise or doubt)
啊 haa4
modal particle ending sentence, showing affirmation
approval
surprise
appreciation
consent
request for an answer or confirmation