- I talked to Jane an hour ago.
- We played tennis last Sunday.
- He phoned me two hours ago.
- It rained yesterday.
- They travelled by plane last month.
- I walked the dog five hours ago.
- I listened to music last night.
- He worked in London last year.
- We played tennis yesterday.
- Tim cooked dinner last Monday.
Правило: ago употребляется после периода времени, а last — перед обозначением завершённого периода или конкретного дня.