My sister is always in such a hurry that she often leaves things behind.

Do you have everything?

I left something in the room.

She called him back to give him something left behind.

He is always forgetting things.

I left behind something today.

Please leave nothing behind.

The bag has been left behind.

"Just wait 10 seconds. I'll get the thing you left." "Okay. I'll count to ten: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10! Hey, are you done yet?" "Hang on, you count too fast!"

Have you forgotten anything?

There are a lot of forgotten erasers in the classroom.