How to ask a rhetorical question with 什么
Rhetorical questions are questions where an answer is not really expected. It is often used to express indignation or astonishment.
什么 
can be used to ask a rhetorical question that expresses indignation or annoyance.
The predicate in these sentences can be expressed either by a verb or an adjective.
can be used to ask a rhetorical question that expresses indignation or annoyance.
The predicate in these sentences can be expressed either by a verb or an adjective.Scheme
(subject)
predicate
什么?
Pay attention
什么 is often followed by the particle 啊 .
.Examples
他懂什么？
What does he know?
tā dǒng shénme
舒服什么啊，办公室空调坏了
What comfort are we talking about? The air conditioner in the office is broken.
shūfú shénme a, bàngōngshì kòngtiáo huài le
玩儿什么，我们赶快工作吧
What are you doing? Let's get to work
wánr shénme, wǒmen gǎnkuài gōngzuò ba
If the predicate is expressed by separable verbs, then 什么 is placed between thea verbal part and the nominal part of the sentence.
Examples
离什么婚? 你们结婚才三个月
Why are you getting divorced? You've only been married for three months
lí shénme hūn? nǐmen jiéhūn cái sān ge yuè
道什么歉啊 ，又不是你的错
Why are you apologizing? It's not your fault
dào shénme qiàn a, yòu bú shì nǐ de cuò
If the predicate is expressed by a monosyllabic verb, it can be reduplicated according to the following structure:
Scheme
verb
什么
verb
Examples
你看什么看，没见过美女啊？
What are you looking at? Never met a pretty woman before?
nǐ kàn shénme kàn, méi jiàn guò měinǚ a
你笑什么笑，看我做错了，你很开心吗？
What are you laughing at? Are you happy watching me do something wrong?
nǐ xiào shénme xiào, kàn wǒ zuòcuò le, nǐ hěn kāixīn ma
看什么看，再看就迟到了！
What are you looking at? If you keep looking, you'll be late!
kàn shénme kàn, zài kàn jiù chídào le