1. The store (to have) two big sales since then. 2. How long ago you (arrive) here? 3. I expect these young men (to tell) you who I am.

1). The store has had two big sales since then. (Present Perfect, affirmative. The tense marker is "since then").

2). How long ago did you arrive here? (Past Simple, interrogative. The tense marker is "long ago").

3). I expect these young men have told you who I am. (Present Perfect, affirmative).