1. You have written a composition. 2. He has ridden a horse. 3. She has brought some photos. 4. It has run away. 5. We have apologised. 6. You have finished your work. 7. They have gone on an excursion.

Reframing to Short Form:

• 1. You've written a composition.
• 2. He's ridden a horse.
• 3. She's brought some photos.
• 4. It's run away.
• 5. We've apologised.
• 6. You've finished your work.
• 7. They've gone on an excursion.

Explanation: The instruction is to convert the long form of sentences to their short form. This involves contracting "have" to "'ve" and "has" to "'s".