How to pronounce 變黑 in Cantonese (4 out of 5):

北京嘅天空突然全部變黑, 好似夜晚咁
The sky in Beijing suddenly turned dark, like at night.

Cantonese Sentence Breakdown

北京 bak1 ging1
Beijing
koi3
indignant
generous
to sigh (with emotion)
天空 tin1 hung1
sky
突然 dat6 jin4
out of the blue
全部 cyun4 bou6
(determiner) all of
變黑 bin3 hak1
turn black
好似 hou2 ci5
(adjective) similar
夜晚 ye6 maan5
night
gam3
so (Cantonese)
Mandarin equivalent: 这样zhèyàng [这样], like this