This is an irregular verb. It is a highly irregular verb.
Present Tense: doy, das, da, damos, dais, dan
Preterite: di, diste, dio, dimos, disteis, dieron
Subjunctive: dé
PresentPresente
Me da igual si llegas un poco tarde.
It's all the same to me if you arrive a little late.
PreteritePretérito indefinido
Ayer le dimos las gracias al conductor.
Yesterday we thanked the driver.
Negative ImperativeImperativo negativo
No den su contraseña a nadie.
Don't give your password to anyone.