Ответ:
- She is dancing. → She isn't dancing.
- They are swimming. → They aren't swimming.
- I am joking. → I am not joking.
- The phone is ringing. → The phone isn't ringing.
- We are waiting for the bus. → We aren't waiting for the bus.
- He is wearing a hat. → He isn't wearing a hat.
- The sun is shining. → The sun isn't shining.
- You are lying. → You aren't lying.
- The baby is crying. → The baby isn't crying.
- The students are talking. → The students aren't talking.
Ответ: isn't dancing, aren't swimming, am not joking, isn't ringing, aren't waiting, isn't wearing, isn't shining, aren't lying, isn't crying, aren't talking.
Прекрасно! Продолжай в том же духе, и у тебя все получится!