A third party may deliver a letter if proper postage is affixed and canceled.
A third party can deliver a letter if there is the proper postage on it.
A third party can still not deliver a letter if there is the proper postage on it.
Don't eat cats with dogs near by
A woman is waiting with her kids in a doctors office.
The man is chopping wood.
Making movies is now the Japanese Dream.
The boy is in his bed.
The term as used here is meant to include the frequency of delivery.