1) Apostrophes have two main uses - to show omission of letters in contractions and to show possession. They are placed after the possessor to indicate something is possessed.
2) Quotation marks are used to set off exact words from a speaker or writer and to set off titles of short works like articles, songs, or poems.
3) Commas are used to separate items in a series, set off introductory phrases, and separate two independent clauses joined by a conjunction. They also set off interrupting words or phrases and quotations.