This is the 137th most frequent Serbian word.
да
"Да" means "yes" in English.
In this sentence, 'да' introduces a subordinate clause indicating an action.
Хоћеш ли да идемо у биоскоп?
Do you want to go to the cinema?
Here, 'да' functions to connect a main clause with a reported clause.
Рекао сам да те видим сутра ујутру.
I said I would see you tomorrow morning.
In this sentence, 'да' is part of the interrogative phrase 'да ли' used to form yes/no questions.