- Student's exchange
- Family pride
For the above examples, I want to understand why the apostrophe is or isn't used? How does one determine this?
For the above examples, I want to understand why the apostrophe is or isn't used? How does one determine this?
Possession: Use an apostrophe to indicate that the noun to which the apostrophe is appended is the owner or possessor of the following noun or noun phrase.
"The student's union" is appropriate if the union is a thing owned by a single student to whom you're referring.
"The students' union" would indicate a union belonging to many students.
If the use is descriptive but not indicating possession or ownership, no apostrophe is used. Thus we could speak of "the students list" (a list of students, but not a list possessed by a student).
Here's a somewhat contrived example using all three:
"The first student's students list was more complete than the next two students' students lists."
Contraction: use an apostrophe to indicate omission of letters, as in "can not" -> "can't", etc.