My grandfather died in the Second World War.

Are you still driving that car that your grandfather gave you?

My grandfather used to drink beer on the weekends.

"Mom, those mushrooms marinated in soy sauce in the fridge look good. Can I eat some of them?" "Sure, you can, but they made my stomach feel weird when I ate them, so be careful." "Huh? Who made them?" "Oh, Grandpa picked out the mushrooms out in the mountains, and then Grandma put them in the soy sauce." "Uh, doesn't that mean that there are inedible mushrooms mixed in there?" "Oh, maybe..."

Tom's great-great-grandfather grew up in the same town as Mary's great-great-grandmother.