Questions & Answers about Он заказал виски.
Заказать is the infinitive, meaning to order.
Заказал is the past-tense form: ordered.
In this sentence, the verb is in the past tense masculine singular because the subject is он.
A few matching forms:
- он заказал = he ordered
- она заказала = she ordered
- они заказали = they ordered
So Он заказал виски uses the correct finite verb form for he.
It tells us three things at once:
- past tense
- singular
- masculine
Russian past-tense verbs agree with the subject in gender and number.
Because the subject is он, the masculine past form заказал is used.