Sure, let's write affirmative (✓) and negative (*) present continuous sentences for each given prompt.
1. they/swim
- (✓) They're swimming.
- (x) They aren't swimming.
2. I/have/lunch
- (✓) I'm having lunch.
- (x) I'm not having lunch.
3. we/get/up/early
- (✓) We're getting up early.
- (x) We aren't getting up early.
4. the dog/run/in the park
- (✓) The dog's running in the park.
- (x) The dog isn't running in the park.
5. I/revise/English
- (✓) I'm revising English.
- (x) I'm not revising English.
6. Jaime/exercise/at the moment
- (✓) Jaime's exercising at the moment.
- (x) Jaime isn't exercising at the moment.
Each pair of sentences includes an affirmative (✓) sentence and a negative (x) sentence in the present continuous tense, conforming to the instructions provided.