He went on talking as though nothing had happened.
- Il continua de parler comme si de rien n'était.
In order to achieve great things, we must live as though we are never going to die.
- Pour exécuter de grandes choses, il faut vivre comme si on ne devait jamais mourir.
He went on reading the book as if nothing had happened.
- Il a poursuivi la lecture de son livre comme si rien ne s'était passé.
He was smiling as if nothing had happened to him.
- Il souriait comme si rien ne lui était arrivé.