1.
I'm swimming.
She isn't swimming.
2.
We're windsurfing.
He's not windsurfing.
3.
I'm not snorkeling.
They 're snorkeling.
4.We aren't surfing.
They 're surfing.
Объяснение:
2) she isn’t
3) they’re
4) he isn’t
1.
I'm swimming.
She isn't swimming.
2.
We're windsurfing.
He's not windsurfing.
3.
I'm not snorkeling.
They 're snorkeling.
4.We aren't surfing.
They 're surfing.
Объяснение: