The reverse gears of the car are very useful.

The movie includes a flashback to explain the story.

My great-grandfathers are remarkable men.

My great-aunts are very kind.

My great-grandaunt is a remarkable woman.

My great-grandnephew is very curious and intelligent.

My great-granduncle is a veteran of World War II.

My great-grandniece is very cute.

My great-nieces are very endearing.

My great-nephews are very noisy.