They have just wrote a letter . the boy has played with a dog. нужно оба поставить в отрицательную форму и составить по 5 видов вопросов на каждое

1. a. They haven't written a letter yet.
    b.Have they written a letter yet?
       Who has just written a letter?
       What have they done?
       What have they just written?
       They have just written a letter, haven't they?

2. a. The boy has't played with a dog yet.
    b. Has the boy played with a dog?
        Who has played with a dog?
        What has the boy done?
        What has the boy played with a dog?
        The boy has played with a dog, hasn't he?