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
