Noun phrases can show person (first, second or third) and number (singular or plural). The person and number of the noun phrase which is the subject of a clause decides the person and number of the verb. This is called agreement.
noun phrase subject
person and number
you enjoy Prague.
first person singular
awake all night.
first person plural
second person singular or plural
third person singular
third person plural
Where there is more than one subject joined by and, the verb is plural:
Gerry and his brother are coming to stay next week.