Definition of "shouldst"

Doth it ſeem good to thee that thou ſhouldſt calumniate me, and oppreſs me, the work of thy own hands, and help the counſel of the wicked?

1750, The Holy Bible […] Newly reviſed, and corrected according to the Clementin Edition of the Scriptures. (Douay–Rheims Bible, Challoner Revision), Job 10:3, page 15