Place an apostrophe in every contraction. A contraction is a combination of two words such as "it is," which becomes "it's" or "has not," which becomes "hasn't."
Refrain from using an apostrophe when writing something as a plural. Many people make the mistake of placing an apostrophe in front of an "S" in too many words. For example, if you say, "The kittens are playing nicely in the yard," you do not need to use an apostrophe.
Use an apostrophe when indicating possession. For example, "The kitten's paw is stuck," requires the use of an apostrophe because the subject of the sentence belongs to the kitten.
Write an apostrophe when indicating possession of a noun. For example, "Charles' dog ran away" requires the use of an apostrophe even though there is already an "S" at the end of the noun. You can also write the sentence as, "Charles's dog ran away." Whichever method you choose is fine, but you must use the same method throughout the comic to keep it consistent.
Place the apostrophe after the "S" when you are referring to a plural noun that is also possessive. For example, if you say, "The Jones' dog ran away." It is not appropriate to place an apostrophe and additional "S" to the end of a name when it is both plural and possessive already; the "Jones" is plural because it is the entire Jones family to which you are referring.