the construction is ambiguous. Ye may either be a nominative case governing the verb busk, or an accusative case governed by it.
This is an instance of what may be called the equivocal reflective.
CHAPTER VI.
ON THE SYNTAX OF THE DEMONSTRATIVE PRONOUNS, AND THE PRONOUNS OF THE THIRD PERSON.
[§ 444]. As his and her are genitive cases (and not adjectives), there is no need of explaining such combinations as his mother, her father, inasmuch as no concord of gender is expected. The expressions are respectively equivalent to
mater ejus, not mater sua;
pater ejus, — pater suus.
[§ 445]. It has been stated that its is a secondary genitive, and it may be added, that it is of late origin in the language. The Anglo-Saxon form was his, the genitive of he for the neuter and masculine equally. Hence, when, in the old writers, we meet his, where we expect its, we must not suppose that any personification takes place, but simply that the old genitive common to the two genders is used in preference to the modern one limited to the neuter, and irregularly formed.