According to Wikipedia...
Early Modern English used "to have" and "to be" as the auxiliaries for the present perfect, with a similar distinction to other modern European languages. This usage has practically disappeared from Modern English.
Examples of this conjugation can still be found in older texts:
Madam, the Lady Valeria is come to visit you.
-- The Tragedy of Coriolanus by William Shakespeare
Vext the dim sea: I am become a name;
-- Ulysses by Alfred, Lord Tennyson
Pillars are fallen at thy feet,
Fanes quiver in the air,
A prostrate city is thy seat,
And thou alone art there.
-- Marius amid the Ruins of Carthage by Lydia Maria Child
I am come in sorrow.
-- Lord Jim by Joseph Conrad
