Tom always wears a helmet when riding his motorcycle.

I always wear a helmet when I ride my bicycle.

Please tell Mary she should wear a helmet.

You guys should really be wearing helmets.

Your helmet is on backwards.

Tom took his helmet off.

Because Mennad wore a helmet, he's still alive right now.

Tom has told Mary she needs to wear a helmet.

Mennad's helmet is full of snot.

Mennad put his helmet on.