'Ought' in the Bible

But fornication and every kind of impurity, or covetousness, let them not even be mentioned among you, for they ought not to be named among God's people.

But as the church is subject to Christ, so also the wives ought to be to their husbands in everything.

So ought men to love their wives as their own bodies. He that loveth his wife loveth himself.

For which I am an ambassador in bonds: that therein I may speak boldly, as I ought to speak.