Ответ:

3a

  1. We can use ever in questions with the present perfect. It means 'at any time in your life'.
  2. We use just with the present perfect to talk about very recent activities.
  3. We use already with the present perfect to say that something has happened, possibly earlier than we thought.
  4. We can use never to make negative sentences in the present perfect. It means 'at no time in your life'.
  5. We use since and yet with the present perfect to talk about things that started in the past and continue in the present. We use for with periods of time, and since with specific moments in time.
  6. We use never with the present perfect to say that something has not happened, but we think it is going to happen soon. We use it in negative sentences and questions.