'Shouldest' in the Bible

And he said, Who told thee that thou wast naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat?

that I will not take a thread nor a shoe-latchet nor aught that is thine, lest thou shouldest say, I have made Abram rich:

And Laban said unto Jacob, Because thou art my brother, shouldest thou therefore serve me for nought? Tell me, what shall thy wages be?

And Jacob answered and said to Laban, Because I was afraid: for I said, Lest thou shouldest take thy daughters from me by force.