'Shouldest' in the Bible

Lest thou shouldest ponder the path of life, her ways are moveable, that thou canst not know them.

And why shouldest thou, my son, be ravished with a strange woman, and embrace the bosom of a stranger?

For better it is that it be said unto thee, Come up hither; than that thou shouldest be put lower in the presence of the prince whom thine eyes have seen.

Though thou shouldest bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.