'Shouldest' in the Bible

And Laban said to Jacob, Because thou art my brother, shouldest thou serve me for nothing? tell me, what shall be thy wages?

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

if thou shouldest afflict my daughters, or if thou shouldest take wives besides my daughters, no man is with us; see, God is witness between me and thee!