John: It's Tom, my parrot. Vet: Really? How?
John: I don't know.
Vet: How old is he?
John: He's about four years old. .
Vet: Let's have a look at him.
John: OK .
Vet: Hi, John. What's the matter?
Vet: Oh, what's wrong with him?
John: I think he's got a broken wing.
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"Currently, it is difficult to list all the activities, entertainment and Hobbies that people do in their free time. More and more people prefer to watch movies, performances, sports events on TV, rather than attend them. There are completely different types of leisure activities that give thousands of people a sense of excitement and expectation. People choose different activities to spend their free time. Today, people spend hours watching various informational, educational, or environmental programs. Other popular activities include surfing the Internet, playing computer games and listening to the radio, reading books (often electronic), drawing, etc. Many people prefer to engage in various sports and lead an active lifestyle. Sometimes they participate in competitions or contests and have a very good time. There are people who prefer a quiet way to spend their free time. They love walking in parks or gardens. More serious people prefer to visit museums and galleries. Leri or

The Dillons don’t live at 45 Green Street
Does she come home late?
We don’t   do homework every evening
Do they get up early?
Does my brother visit our grandmother every Sunday?
He doesn’t know these rules.
 My parents don’t work at this plant.
The girl doesn’t play the piano.
Our friends don’t like reading.
These boys don't play football. 

Всё просто: когда подлежащее во множественном числе (например: they, we, friends, boys, parents) и после местоимения I  ставим DO/DON'T

Если же в единственном (например: she, he, girl, boy, brother)  ставим DOES/DOESN'T