I brought her a book, from the library, which she enjoyed very much.
This is the house that she bought.
I do not want you to repeat what I have told you.
(1) In the last sentence what is equivalent to that which or the thing which. It differs from the other relative pronouns in that its antecedent is never expressed, it being implied in the word itself (that which).
(2) What is always of the neuter gender, and is used in only the nominative and the objective case. Who, whose, and whom are either masculine and feminine (common gender) and are used, respectively, in the nominative, the possessive, and the objective case.
(3) Which is neuter and may be used in either the nominative or the objective case.
(4) Whose is the form of the possessive for either who or which.
Remarkable, Remarkably.—“She is a remarkable pretty girl.” Say remarkably pretty.
Reside and Live.—The simple word live is preferable to reside when referring to one’s place of residence, reside being reserved for more stately occasions.
Respect.—Instead of “in respect of,” say “in respect to,” or “with respect to.”