2. The book isn't on the table // Is the book on the table? - Yes, it is/ No, it isn't

3. Nam and Ba aren't very well // Are Nam and Ba very well? - Yes, they are/ No, they aren't

4. He isn't a doctor // Is he a doctor? - Yes, he is/ No, he isn't

5. The children aren't good students // Are the children good students? - Yes, they are/ No, they aren't

6. Thu isn't pretty // Is Thu pretty? - Yes, she is/ No, she isn't

7. She isn't in her classroom // Is she in her classroom? - Yes, she is/ No, she isn't

8. They aren't tall // Are they tall? - Yes, they are/ No, they aren't

*Cấu trúc thì hiện tại đơn (động từ tobe):

(+) S + is/ am/ are + ...

(- ) S + is/ am/ are + not + ...

(? ) Is/ Am/ Are + S + ...

- Yes, S + is/ am/ are

- No, S + is/ am/ are + not

3. Nam and Ba aren't very well

    Are Nam and Ba well?

=> Yes, it is/ No, it isn't

4. He isn't a doctor

    Is he a doctor?

=> Yes, he is/ No, he isn't

5. The children are not good students

    Are the children good students?

=>Yes, they are/ No, they aren't

6. Thu isn't pretty

    Is Thu pretty?

=> Yes, she is/ No, she isn't

7. She is not in her classroom 

   Is she in her classroom?

=>  Yes, she is/ No, she isn't

8. They aren't tall

    Are they tall?

=> Yes, they are/ No, they aren't