4. When a compound noun, or a group of words treated as one name, is used to denote possession, the sign of the possessive is added to the last word only; as, Charles and John's mother (the mother of both Charles and John), Brown and Smith's store (the store of the firm Brown & Smith).
5. Where the succession of possessives is unpleasant or confusing, the substitution of a prepositional phrase should be made; as, the house of the mother of Charles's partner, instead of, Charles's partner's mother's house.
6. The sign of the possessive should be used with the word immediately preceding the word naming the thing possessed; as, Father and mother's house, Smith, the lawyer's, office, The Senator from Utah's seat.
7. Generally, nouns representing inanimate objects should not be used in the possessive case. It is better to say the hands of the clock than the clock's hands.
Note.—One should say somebody else's, not somebody's else. The expression somebody else always occurs in the one form, and in such cases the sign of the possessive should be added to the last word. Similarly, say, no one else's, everybody else's, etc.
Write the possessives of the following:
Oxen, ox, brother-in-law, Miss Jones, goose, man, men, men-servants, man-servant, Maine, dogs, attorneys-at-law, Jackson & Jones, John the student, my friend John, coat, shoe, boy, boys, Mayor of Cleveland.
Exercise 5
Write sentences illustrating the use of the possessives you have formed for the first ten words under Exercise 4.