什么都
shén me dōu
Expressing "everything" with "shenme dou"
A question word plus 都 stops being a question and becomes "every" or, negated, "not any".
什么 + 都 / 也 + Verb
How it works
爸爸什么都知道 — dad knows everything. 我什么都不想吃 — I don't want to eat anything.
也 can replace 都 in the negative: 我什么也没买.
The same trick works with the other question words — 谁都, 哪儿都, 什么时候都 — which HSK 3 develops further.
Examples
bà ba shén me dōu zhī dào
爸爸什么都知道。
Dad knows everything.
wǒ shén me dōu bù xiǎng chī
我什么都不想吃。
I don't want to eat anything.
tā shén me yě méi shuō
他什么也没说。
He didn't say anything.