The correct form is "theirs" without an apostrophe.
Explanation
- "Theirs" is a possessive pronoun used to indicate ownership by a group of people. For example, in the sentence "That house is theirs," it replaces the noun and shows that the house belongs to them.
- "Their's" with an apostrophe is incorrect and should be avoided. Possessive pronouns like "theirs" do not take an apostrophe.
Usage Example
- Correct: "The decision is theirs."
- Incorrect: "The decision is their's."
The correct form is "theirs" without an apostrophe.
Explanation
- "Theirs" is a possessive pronoun used to indicate ownership by a group of people. For example, in the sentence "That house is theirs," it replaces the noun and shows that the house belongs to them.
- "Their's" with an apostrophe is incorrect and should be avoided. Possessive pronouns like "theirs" do not take an apostrophe.
Usage Example
- Correct: "The decision is theirs."
- Incorrect: "The decision is their's."