1. Are they reading magazines? Yes, they are.
2. Are you learning English? Yes, I am.
3. Is Helen writing a letter? No, she isn't.
4. Is Sarah playing the guitar? Yes, she is.
2are learning
3is playing
4is playing
1. Are they reading magazines? Yes, they are.
2. Are you learning English? Yes, I am.
3. Is Helen writing a letter? No, she isn't.
4. Is Sarah playing the guitar? Yes, she is.