Each of these sentences is written using a unique grammatical structure. Try to figure them out

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Each of these sentences is written using a unique grammatical structure. Try to figure them out.
1. Yesterday morning, John ran for 5 hours.
2. Harry's father sold their old house 2 weeks ago.
3. On Jane's last birthday, her parents gave her a new car.
4. Her parents are the most experienced doctors in the city hospital.