Expressing “"All" or "Everything” With 什么都

“什么shénme...都dōu" is a pattern often used to express "all" or "everything". 

Because of 都dōu, we move our object forward. Similar with the 把bǎ grammar. We emphasize object instead of the verb.   

For example:

wǒ jīntiān méiyǒu chī dōngxī. 我今天没有吃东西。Emphasizing 没有吃méiyǒu chī。

wǒ jīntiān shénme dōu méiyǒu chī. 我今天什么都没有吃。 Emphasizing "anything"

什么+(noun)+都+Verb

Evan lǎoshī shénme dōu zhīdào.

Evan 老师 什么都知道。

Teacher Evan knows everything.

Evan lǎoshī shénme dōngxī dōu bùxiǎng chī.

Evan 老师 什么 东西 都 不想吃。

Teacher Evan doesn't want to eat anything.