The adverb 都 dōu refers to a group or two people which have already been mentioned or thought of. As all adverbs, it modifies a verb and always stands in front of this verb.
我 | 们 | 都 | 是 | 德 | 国 | 人 | 。 |
wǒ | men | dōu | shì | dé | guó | rén | _ |
I | pl suffix | all | be | virtue | country | person | _ |
we, us | all, both, already, even | to be, correct, yes | a German | 。 | |||
All of us (both of us) are Germans. |
他 | 们 | 都 | 学 | 汉 | 语 | 。 |
tā | men | dōu | xué | hàn | yǔ | _ |
he | pl suffix | all | study | Chinese ethnicity | language | _ |
they | all, both, already, even | study, learn | Chinese language | 。 | ||
All of them (both of them) learn Chinese. |