1) 1. I do my homework. 2. I don't do my homework. 3. Do you do your homework? 4. Yes, I do. No, I don't.
2) 1. My brother sleeps in the house. 2. My brother doesn't sleep in the house. 3. Does my brother sleep in the house? 4. Yes, he does. No, he doesn't.
3) They love the weekend. 2. They don't like weekend. 3. Do they like weekend? 4. Yes, they do. No, they doesn't.
4) 1. My friends sing songs. 2. My friends don't sing songs. 3. Do my friends sing songs? 4. Yes, they do. No, they don't.