It was as though the dogs were afraid of something.
- C'était comme si les chiens avaient peur de quelque chose.
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 was smiling as if nothing had happened to him.
- Il souriait comme si rien ne lui était arrivé.
He looked as if nothing had happened.
- Il semblait comme si rien n'était arrivé.