'Shouldest' in the Bible

and he besought him much, saying, My little daughter is at extremity; I pray that thou shouldest come and lay thy hands upon her so that she may be healed, and may live.

And James and John, the sons of Zebedee, come unto him, saying, Master, we would that thou shouldest do for us whatsoever we shall desire.

and they say to him, By what authority doest thou these things? and who gave thee this authority, that thou shouldest do these things?