Dryden, Poems, Vol. II. p. 220.
It ought to be Thou.
“But Thou false Arcite never shall obtain
Thy bad pretence.”⸺
Dryden, Fables.
“That Thou might fortune to thy side engage.”
Prior.
It ought to be shalt, mightest. The mistake seems to be owing to the confounding of Thou and You as equivalent in every respect; whereas one is Singular, the other Plural. See above, p. 48. “Great pains has [have] been taken.” Pope, P. S. to the Odyssey. “I have considered, what have [hath] been said on both sides in this controversy.” Tillotson, Vol. I. Serm. 27.