He tripped on the stair and fell down.
She was too weak to climb the stairs.
It is downstairs, on the ground floor.
I can’t walk upstairs. Can you help me?
He is tired from running up the stairs.
He was close to falling down the stairs.
The stairs are too steep to climb easily.
We were terrified to climb the steep stairs.
The stairs are too steep for him to climb easily.
The sign warns people to be careful on the stairs.
We suggested using the stairs instead of the elevator.
