Question

1-I would advise you to take permission from the principal before you go out(Begin you had)
2 smoking is prohibited here begin no one

Answer 1

1. You had to take permission from the principle before you went out.

2. No one is allowed to smoke here.

Hope it helps :)

Answer 2

1) you had to take permission from the principal before you go out.

2) no one is allowed to smoke here.

Hope it helps