What? I don't get what this question is asking.
The answer would be an argument.
The grammar for this is confusing, since I would say, for example the first one, played. But this would be: play, rides, read, sleep, study, works, cooks, speaks, sings, dances. It’s a bit confusing. For the my dad work/works one, it would be works because he is doing it. If we were to use work for this, then it would be something like, “My dad goes to work everyday.” Hope this helped a bit
1.How long have I known Bob
2.How long have Sue and Alan been married?
3.How long has George been unemployed?
4.How long have those books been here?
5.How long has Mary been at the airport?
6.How long has my sister been ill?
7.How long has she had a bad cold?
8.How long is Jan's hair?
9.How long have I had a yacht?
10.How long have they been in the restaurant?
11. How long have my parents been in London?
12.How long has the cat been under the table.
Hope this Helps:)!