But the old dog's been at it going on 25 years.
For 25 years there has been an old dog doing it.
The dog has only been at it for a few months.
A man in an orange shirt is drinking a margarita.
A man standing in a blue shirt.
A dog is barking at the carnival.
H'm! expressed Tuppence.
Someone just finished running.
They were walking for a long time.