Answer:
1. The wind has blown all the leaves off the tree.
2. All the leaves have fallen to the ground.
3. My kite is being flown in the wind.
4. A shower of acorns have fallen from the sky
5. A busy squirrel dug for his acorns.
6. In the garden, pumpkins have grown.
7. Yesterday my friend and I rode to the park.
8. We have rode to the skate park.
9. My brother wrote me a letter.
10. He has written a essay.
11. Our neighbor had given us a pie.
12. Mom and Dad have spoken to me about cleaning my room.
Explanation: