1) Yes, I have just done my homework.
No, I haven't done my homework yet.
2) Yes, I have already finished my project.
No, I haven't finished my project yet.
3) Yes, I have just watered flowers.
No, I haven't watered flowers yet.
4) Yes, I have already watched this film.
No, I haven't watched this film yet.
5) Yes, I have already sent a letter to my friend.
No, I haven't sent a letter to my friend yet.
6) Yes, I have already raked leaves in the garden.
No, I haven't raked leaves in the garden yet.