3. Has Tom written the letter yet
Yes, he has already written the letter.
4. Has Sophia watched the news yet
No, she hasn`t watched the news yet.
5. Has Mum cleaned the house yet
No, she hasn`t cleaned the house yet.
6. Have they done the shopping yet
Yes, they have already done the shopping.
7. Have you washed the clothes yet
Yes, I have already washed the clothes.
8. Has Bob gone to bed yet
No, he hasn`t gone to bed yet.