When you are referring to two people named Sam, the plural form is Sams, the plural possessive form is Sams'; for example: The two Sams' desks are next to each other.
If you are referring to someone with the name Sams. Sams Smith, or Sams Benson. Sams could be a name, but it is more likely that you want to write Sam's. Sam's pen is blue. John's pen is black. Roberta's pen is orange.
The possessive noun is Sam's (without the apostrophe, the word Sams is the plural form for the noun Sam).The pronoun is the possessive adjective is its.The contraction your're also requires an apostrophe, it is a short form for 'you are'; the apostrophe takes the place of the letter 'a'.
The possessive singular noun is explorer's. The possessive plural noun is explorers'.
The possessive form for the noun coyote is coyote's.
The possessive form of zoo is zoo's.
The possessive form for the noun preacher is preacher's.
The possessive form for the noun laboratory is laboratory's.
No, he is not possessive. The possessive form would be his.
The possessive form for the noun oxygen is oxygen's.
The possessive form is grandson's.
The possessive form is island's.
The possessive form for the noun coyote is coyote's.
No, it is a singular possessive noun.