The food is burning. Have you turned off the oven? - No, I haven't.
The flowers are dirty. Has Ann watered them? – No,
she hasn`t.
The kitchen floor is dirty. Has Scott cleaned it? – No, he hasn`t.
The baby is crying. Has Carol fed her? – No, she hasn`t.
There isn't any milk. Have Tim and Chris done shopping? - No, they haven't.
Mary is on the phone. Have you told her good news? No, I haven't.
The fridge isn't working. Has Sam called a repairman? – No, he hasn`t.
Our guests are here. Has Bill set the table? – Yes, he has.