When authors have written, "Spring is come!," it means "Spring has come."
However in stories or plays by people from days long sped, I often come across this sort of sentence, for which unfortunately I cannot find a source offhand since this has been a lingering question in my mind to which I have paid scanty attention:
When our ship was come to the shore, I said to my first-mate thus..."
Is this "was" the same as "had come"?