Thier or Their: Which Is Correct?

"Thier" is not the correct spelling. The correct spelling is "their."

"Their" is a pronoun used to show possession or ownership by a group of people. It is used when you want to indicate that something belongs to more than one person or a group of individuals.

For example:

"Their car" means the car belongs to a group of people, not just one person.
"Their house" indicates that the house is owned by more than one person.

In English, possessive pronouns like "their" are used to avoid repeating the names of the individuals who own or possess something. Instead of saying "John's car and Mary's car," you can simply say "their car" when referring to a car owned by both John and Mary.

Here are some more examples to help illustrate the usage of "their":

"The students brought their books to class." (The books belong to the students collectively.)
"The family loves spending time in their garden." (The garden is owned by the family.)
"The employees celebrated their colleague's promotion." (The promotion belonged to one colleague, but it is celebrated by all the employees.)

"Their" can also be used to replace a singular gender-specific pronoun such as "his" (used for males) or "her" (used for females) in certain situations. It is a gender-neutral option that avoids assuming someone's gender or using repetitive phrases like "his or her" in sentences.

Using "their" as a singular gender-neutral pronoun is becoming increasingly common in modern English, especially in informal speech and writing. It is a way to be inclusive and respectful of individuals whose gender might not be explicitly known or relevant to the conversation.

However, it's essential to note that the use of "their" as a singular pronoun has been a subject of debate in English grammar, particularly in formal writing. Some style guides and institutions still prefer using "he or she," "his or her," or rephrasing sentences to avoid using "their" in the singular context.

Example sentences

Alex and Sam lost their keys, and now they can't get into the house.
The employee left their umbrella in the office yesterday.
Each student should bring their own materials for the art class.
The doctor explained the procedure to the patient and answered their questions.
The team members celebrated their victory with cheers and high-fives.
The customer can customize their order according to personal preferences.
Everyone should take care of their health by eating well and exercising regularly.
The teacher praised the students for their hard work and dedication.
The hikers set up their tents and camped near the lake.
The children were excited to show their parents the artwork they had created.

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