1. He's already eighty but still going strong.

2. A painting by Van Gogh has been sold in New York for more than eighty-two million dollars.

3. There are seventy cats and eighty dogs in his yard.

4. The city is going to place an order for a hundred and eighty-eight buses.

5. He's nearly eighty!

6. Eighty horses trotted up.

7. Eighty million years ago, dinosaurs ruled the earth.

8. The stadium has been fitted with seating for over eighty.

9. My grandfather is eighty years old.

这些例句展示了"eighty"作为数词、名词以及用于描述年龄、数量等的用法。希望这些例句对你有所帮助。