7.3 Complete the sentences using the present perfect: 1) Sally is still here. ... (she / not / go) out. 2) I can’t find my bag. ... (you / see / it) anywhere? 3) I can’t log on to the website. ... (I / forget) my password. 4) I sent Joe an email this morning, but ... (he / not / reply). 5) Is the meeting still going on, or ... (it / finish)? 6) ... (the weather / change). It’s colder now. 7) ... (you / not / sign) the form. Could you sign it now, please? 8) Are your friends still here, or ... (they / go) home? 9) Paul doesn’t know what he’s going to do (he / not / decide / yet). ... (I / just / see / her). 10) ‘Where is David?’ ‘He’s not here. ... (he / already / go).’ 12) A: ... (your course / start / yet)? B: Not yet. It starts next week.

1. Sally is still here. She hasn’t gone out.
2. I can’t find my bag. Have you seen it anywhere?
3. I can’t log on to the website. I’ve forgotten my password.
4. I sent Joe an email this morning, but he hasn’t replied.
5. Is the meeting still going on, or has it finished?
6. The weather has changed. It’s colder now.
7. You haven’t signed the form. Could you sign it now, please?
8. Are your friends still here, or have they gone home?
9. Paul doesn’t know what he’s going to do. He hasn’t decided yet.
10. I’ve just seen her.
11. ‘Where is David?’ ‘He’s not here. He’s already gone.’
12. A: Has your course started yet?
    B: Not yet. It starts next week.

Present perfect образуется с have/has и третьей формой смыслового глагола; yet обычно употребляется в вопросах и отрицаниях, just — для недавнего действия, already — для действия, которое уже произошло.