The present continuous form is: subject +be verb (am /is /are)+ verb ing form [present participle]
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't and are not can be abbreviated as are' t, but am not is abbreviated as Ain't in modern English-in old English and poetry.
Usage:
1. When the original object (noun/pronoun) as the subject has a long infinitive phrase (compound structure), prepositional phrase, clause modification or complement, the infinitive phrase, prepositional phrase, clause and complement generally remain in the original position. For example:
They are revising the law to protect the rights of women and children.
They are revising the law to protect the rights of women and children.
2. If the predicate verb used in the present continuous tense is a verb phrase or idiom, then this verb phrase or idiom only changes the verb into the passive voice, and the other parts remain unchanged. For example:
The parents are taking good care of their IVF.
Parents are taking care of their test-tube baby.