I checked over my shoulder to see if Joshua was paying attention.

Jack checked over his shoulder, making sure no one was around.

She checked over her shoulder to make sure Richard was still with her.

The doctor checked back over her shoulder; she was the last to see it.

I kept checking over my shoulder to see that she was all right.

He checked over his shoulder to see if the man was looking.

He checked over his shoulder to make sure no one was looking.

She checked over her shoulder and took a long look down the dark street.

I'm trying to look out for the envelope, but I can't stop checking over my shoulder.

I'm tempted to check over my shoulder, but it's more important to appear calm.