He hides his sorrow behind a smile.
- Il cache sa tristesse derrière un sourire.
Good morning, said Tom with a smile.
- « Bonjour », dit Tom avec un sourire.
That person has had an odd grin on his face for a while. What do you suppose is behind it?
- Cette personne a eu un étrange sourire sur la figure pendant un instant. Que pensez-vous que cela cache ?
He grinned broadly at us.
- Il nous fit un large sourire.
She looked at him with a smile on her face.
- Elle le regarda, le sourire aux lèvres.
She approached him with a smile on her face.
- Elle lui fit des avances, un sourire aux lèvres.