Ellipses of nominative in the first or second personA Nominative in the second person plural or first person is less commonly omitted.
“They all rush by
And leave you hindermost;
Or like a gallant horse, fall'n in first rank,
(You) Lie there for pavement to the abject rear.
The I before "pray thee," "beseech thee," is constantly omitted. (Tempest, ii. 1. 1.)
“They . . . gave me cold looks,
And, meeting here the other messenger,
Having more man than wit about me, (I) drew.
i.e. "I ask you whether you know." The inflection of the second person singular allows the nominative to be readily understood, and therefore justifies its omission.
“Good-morrow, fair ones;
(I) pray you if you know.
“It was she
“Art any more than a steward?
First told me thou wast mad; then (thou) cam'st in smiling.” Ib. v. 1. 357.