Extended data 1, affirmative sentence: subject +be verb (am /is /are)+ verb ing+ others.
2. Negative sentence: subject +be verb (am /is /are)+not+ verb ing+ others.
3. General interrogative sentences: be verb+subject+verb ing+ others.
Affirmative answer: Yes, subject +be.
Negative answer: no, subject +be is not.
4. Special questions: special questions+general questions.
Answer according to actual situation.
Note: is not can be abbreviated as isn and are not can be abbreviated as are not, but in modern English-in old English and poetry, am not is abbreviated as ain't't.