were
The word 'erano' is the Italian translation of the English word 'were'. It is the plural past tense of the verb 'essere' (to be) and is used to describe a state or condition in the past for plural subjects. For example, 'They were happy' translates to 'Erano felici' in Italian.
Yesterday, they were at the park.
This sentence uses 'erano' as the third person plural form of the verb 'essere' (to be) in the past tense. It indicates that a group of people were at the park the previous day.
They were ready for the party.
In this instance, 'erano' is used as the third person plural of the verb 'essere' in the past tense. The phrase means that a group of people were prepared for a party.
They were happy to see me.
Here, 'erano' is operating as the third person plural past tense of 'essere', meaning 'to be'. The sentence communicates that a group of people were pleased when they saw the speaker.