dōu 都 all

all; both

Tā-men dōu chuān zhe hēi yī-fu.
他们都穿着黑衣服。
They are all dressed in black.

already

Dōu shí-yī diǎn le, nǐ zěn-me hái bú shuì?
都十一点了，你怎么还不睡？
It’s alrady eleven o’clock, why don’t you go to bed?

even

Tā lián yí jù huà dōu bù gēn wǒ shuō.
他连一句话都不跟我说。
He never said even a word to me.

all (referring to reasons)

Duì-bu-qǐ, dōu shì wǒ-de cuò.
对不起，都是我的错。
I’m sorry, it’s all my fault.