Conversation 1

Man: Has Bob arrived yet?
Woman: No, he hasn’t gotten here yet?
Man: Has anyone tried to call him?
Woman: I don’t think anyone has.
Man: Maybe he has overslept.
Woman: Or maybe he’s forgotten there’s a meeting.

Conversation 2

Man: Have you sent the report?
Woman: No, I haven’t.
Man: Why haven’t you finished?
Woman: I haven’t had time to check the spelling.
Man: Have you finished writing it?
Woman: Yes, I have. Almost done!

Conversation 3

Man: How long have you known Joe?
Woman: I’ve known him since high school.
Man: Wow! That’s a long time.
Woman: Yeah, we have been best friends for a while.
Man: Have you seen him recently?
Woman: No, I haven’t seen him for some time.

Conversation 4

Man: Nice sweater. I haven’t seen it before.
Woman: Oh, this old thing. I’ve had it forever.
Man: How come you haven’t worn it very much?
Woman: Well, it has been too hot to wear it.

Present Perfect - Recent Changes

Point 1: We often use the present perfect to discuss status of actions that need to be done.

Have you finished the report yet?

No, I have not finished yet. / No, not yet.

Have you even started?

Yes, I already started. / Yes, I have

Point 2: We use the particle yet in the questions and negative forms to show an action is time sensitive.

Have you eaten yet?

No, I haven't eaten yet.

Has he left yet?

Not yet. He will leave soon.

Point 3: We also use the word already in the question and affirmative forms to show an action is time sensitive.

Have you already eaten?

Yes, I've already eaten.

Have you already started?

Yes, we already have.

Point 4: Both the present perfect and the simple past can be used to discuss the status of recent events.

Have you finished the report yet?

Yes, I've finished it.

Did you finish the report yet?

Yes, I finished it.