好呀，你行先
hou2 aa3 nei5 haang4 sin1
Sure, you go first
Firstin Cantonese.
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Canto SchoolPronunciation
先
sin1
first
Recorded Cantonese
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When to use it
Use 行先 in a practical request; add 唔該 when asking another person to help you.
Examples
等我開鏡頭先
dang2 ngo5 hoi1 geng3 tau4 sin1
Let me turn on the camera first