(f) Possessive modifier,—“Its members are inflexible men, whose ability has been as frequently manifested as their patriotism.”—Howells.
Note.—To ascertain the use of a relative pronoun in a clause, substitute the antecedent for the pronoun, and observe how the antecedent is used. Sometimes this substitution requires a slight change in the arrangement of the words of the clause. For example, in (e) above, the clause that his brother was becomes his brother was hero.
That, when used as object of a preposition, must precede the preposition; as, “Have you ever heard the Lady—the one that I sit next to at the table—say anything about me?”—Holmes.
That is frequently omitted when object of a verb or preposition; as, “One of the shop windows he paused before was that of a second-hand book-shop.”—George Eliot.
As and but are sometimes used as relative pronouns; the former after such, same, as many, and a few other expressions, the latter after an interrogative or negative antecedent, and as an equivalent of the relative that plus not; as, “There is nothing born but has to die.”
The relative pronoun as may be—
(a) Subject of a verb,—“I went up from the cabin followed by as many as could mount the gangway.”
(b) Object of a verb,—“Chaucer has left us such a picture of contemporary life as no man ever painted.”—Lowell.
(c) Object of a preposition,—“He was such a schoolboy as a discerning master delights in.”—Mrs. Ward.
(d) Subjective complement,—“I shall probably never see just such another day as yesterday was.”—Burroughs.