While working on a sermon the pastor heard a knock at his office door.
"Come in," he invited. A sad-looking man in threadbare clothes came in,
pulling a large pig on a rope. "Can I talk to you for a minute?" asked the... Read more of Sentry Duty at Free Jokes.ca
"I am come" points to my being here, while "I have come" intimates that
I have just arrived. When the subject is not a person, the verb to be
should be used in preference to the verb to have; as, "The box is come"
instead of "The box has come."