A Third Round of Grammar

From the First Book in English Grammar by George Payn Quackenbos (1868).

p. 66

EXERCISE.

       Parse all the words:—If I were you, I would be a better girl.—Try [agrees with its subject you understood] to do your duty.—Blessed be the peace-makers.—Love all men, hate none.—To steal is base.—To tell the truth, if you were to fail, I should be glad.—Take care lest thou go astray.—What care I whether thou stay or go?

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THIS is my attempt to "parse" the first sentence, with a format like the one that the First Book in English Grammar's writer has set forth:

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I, simple personal pronoun, first person, singular number, masculine or feminine gender, nominative case, the subject of the verb were.
If I were, intransitive verb, subjunctive mood, imperfect tense, first person, singular number, and it agrees with the subject I.
You, simple personal pronoun, second person, plural number [in those days], masculine or feminine gender, nominative case, the subject of the verb were.
(— Rule, (from p. 34), "A verb that has no object takes the same case after as before it, when both words refer to the same person or thing.")
I, ditto; the subject of the verb would be.
would be, intransitive verb, potential mood, imperfect tense, first person, singular number, and it agrees with the subject I.
a, indefinite article, and it relates to girl.
girl, common noun, first person, singular number, feminine gender, nominative case, the subject of the verb would be. (Rule above.)
better, common adjective; good, better, best; in the comparative degree, and it relates to girl.

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Finishing the questions is still a little shaky. After I guess the answers, I leaf around in the textbook frequently to verify them. — It brings me back to the Christmas-time King William's College Quiz motto: the better part of knowledge is knowing where to find it. (If that is indeed the motto, remembered correctly.)