'Ought' in the Bible

And he said to them, Why is it that ye have sought me? did ye not know that I ought to be occupied in my Father's business?

But woe unto you, Pharisees! for ye tithe mint and rue and all manner of herbs, and pass over judgment and the love of God: these ought ye to have done, and not to leave the other undone.

For the Holy Ghost shall teach you in the same hour what ye ought to say.

And the ruler of the synagogue answered with indignation, because that Jesus had healed on the sabbath day, and said unto the people, There are six days in which men ought to work: in them therefore come and be healed, and not on the sabbath day.

And ought not this woman, being a daughter of Abraham, whom Satan hath bound, lo, these eighteen years, be loosed from this bond on the sabbath day?

That's the way it is with you. When you have done everything you were ordered to do, say, "We are worthless servants. We have done only what we ought to have done.'"

And he spake a parable unto them to this end, that men ought always to pray, and not to faint;

Ought not Christ to have suffered these things, and to enter into his glory?