How to say "都在笑什么" (dōu zài xiào shén me) in Chinese dialogue

dōuzàixiàoshénme

are always chuckling?

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0129:59
zhī
dào
xué
xiào
de
jǐng
wèi
a

Do you know why guards

LINE 0230:02
PLAYING SCENE
dōu
zài
xiào
shén
me

are always chuckling?

LINE 0330:04
xiào
shén
me

Why?

Show Information
Source MediaTV Series
Season & EpisodeS1 E4
Timestamp30:02
TMDB ID244189