Choose the correct possessive forms.1) (my parents' / my parent's / my parents's) friends are going to visit us.2) the students borrowed each (other/others'/other's) notes.3) i was introduced to (mary's and john's / mary and john's / mary and john) father.4) it was in (king's john reign / king's
john's reign / king john's reign). (mr. brown and miss green's / mr. brown's and miss green's / mr. brown's and miss green) offices are being refurnished.6) his (mother-in-law's hat / mothers-in-law hat / mother-in-laws' hat) costs more than his coat.7) i was at the (baker's / bakers / bakers')
when the explosion happened.8) do you mind (yesterday newspaper/yesterday's newspaper / yesterday' newspapers) on the shelf? 9) are you staying with (wive's/ wifes'/ wife's) family? 10) i am a great fan (peter's and helen's/peter and helen's/peter's and helen) musical.11) (man's in the
corner/man's in the corner's / man in the corner's) dog began to bark.12) the hotel was (ten minutes'/ten minute's/ten minutes) drive from the beach.13) one of our most popular exhibits is (van dyck portrait of king charles / van dyck's portrait of king charles / van dyck portrait of king
charles's).14) was there anything nice at the (butcher / butcher's / butchers') this morning? 15) i bought a new racquet at (sports shop/sport's shop/sports shop's).16) i had just inherited my (grandmother brother's house / grandmother's brother's house / grandmother's brother house).17) we set
up our base camp (the mountain's bottom / the bottom's mountain / the bottom of the mountain).18) they had respect (each's other / each other's / each others) opinions.​

1) my parents' friends are going to visit us.
The possessive form of "parents" should take an apostrophe after the "s" because it refers to more than one parent (plural possessive).

2) the students borrowed each other's notes.
The possessive form of "other" should take an apostrophe after the "s" because it refers to something belonging to multiple students (plural possessive).

3) I was introduced to Mary and John's father.
The possessive form of "Mary and John" should take an apostrophe after the "s" because it refers to something belonging to both Mary and John (plural possessive).

4) It was in King John's reign.
The possessive form of "King John" should take an apostrophe after both "John" and "s" because it refers to something belonging to King John (singular possessive).

5) Mr. Brown's and Miss Green's offices are being refurnished.
The possessive form of "Mr. Brown and Miss Green" should take an apostrophe after both "Brown" and "s" because it refers to something belonging to both Mr. Brown and Miss Green (plural possessive).

6) His mother-in-law's hat costs more than his coat.
The possessive form of "mother-in-law" should take an apostrophe after both "law" and "s" because it refers to something belonging to his mother-in-law (singular possessive).

7) I was at the baker's when the explosion happened.
The possessive form of "baker" should take an apostrophe after the "s" because it refers to something belonging to the baker (singular possessive).

8) Do you mind yesterday's newspaper on the shelf?
The possessive form of "yesterday" should take an apostrophe after the "s" because it refers to something belonging to yesterday (singular possessive).

9) Are you staying with your wife's family?
The possessive form of "wife" should take an apostrophe after the "s" because it refers to something belonging to your wife (singular possessive).

10) I am a great fan of Peter and Helen's musical.
The possessive form of "Peter and Helen" should take an apostrophe after the "s" because it refers to something belonging to both Peter and Helen (plural possessive).

11) The man in the corner's dog began to bark.
The possessive form of "man in the corner" should take an apostrophe after the "s" because it refers to something belonging to the man in the corner (singular possessive).

12) The hotel was ten minutes' drive from the beach.
The possessive form of "ten minutes" should take an apostrophe after the "s" because it refers to something belonging to ten minutes (plural possessive).

13) One of our most popular exhibits is Van Dyck's portrait of King Charles.
The possessive form of "Van Dyck portrait of King Charles" should take an apostrophe after both "Charles" and "s" because it refers to something belonging to Van Dyck portrait of King Charles (singular possessive).

14) Was there anything nice at the butcher's this morning?
The possessive form of "butcher" should take an apostrophe after the "s" because it refers to something belonging to the butcher (singular possessive).

15) I bought a new racquet at the sports shop.
The possessive form of "sport" should not take an apostrophe because it is a noun modifying "shop" (no possession).

16) I had just inherited my grandmother's brother's house.
The possessive form of "grandmother's brother" should take an apostrophe after both "brother" and "s" because it refers to something belonging to the grandmother's brother (singular possessive).

17) We set up our base camp at the bottom of the mountain.
The possessive form is not required in this sentence because "the mountain's bottom" or "the bottom's mountain" do not indicate possession.

18) They had respect for each other's opinions.
The possessive form of "each other" should take an apostrophe after both "other" and "s" because it refers to something belonging to each other (plural possessive).