- Parce que - Because
Je ne suis pas venu parce que mon fils est malade.
I didn't come because my son is sick.
Parce qu'il n'a pas d'argent, il ne peut pas venir.
Because he doesn't have any money, he can't come.
- Car - Because
La réunion fut annulée car le président est malade.
The meeting was canceled because the chairman is sick.
David ne va pas venir, car il est à l'université.
David isn't coming, for he is (away) at school.
- Puisque - Since, because
Tu peux partir puisque tu es malade.
You can leave, since you're sick.
Puisque c'était son erreur, il m'a aidé.
Since it was his mistake, he helped me.
- Comme - As, since
Comme je lis le plus vite, j'ai déjà fini.
As I read the fastest, I've already finished.
Comme il est faible, il ne pouvait pas le lever.
Since he is weak, he couldn't lift it.