Apostrophe -- A punctuation mark ( ' ) used to show possession. Also used in contractions, which should be avoided ... possession example: "That was Jack's favorite coffee mug." contraction example:

The hyphen is a punctuation mark used to join or to separate words. Some examples of hyphenated words are: merry-go-round, light-blue, twenty-four, and re-entry.

Commonly Used and Misused Punctuation Mark ... Use an apostrophe to show where letters have been omitted in a contraction. Examples: can't = cannot; it's = it is.

A punctuation mark ( : ) used after a word introducing a quotation, an explanation, an example, or a series ... A colon is also sometimes used to indicate a tensor contraction involving two indices,

the semicolon (;), used to mark separation between elements in a series of related phrases, ... Each written language has its tradition of punctuation, often very different from that used in English;

Punctuation mark (') used in written English and some other languages. ... An apostrophe may precede the plural s used with numbers and abbreviations (the 1970's, a group of P.O.W.'s) but is just as

Punctuation mark (') used in written English and some other languages. ... An apostrophe may precede the plural s used with numbers and abbreviations (the 1970's, a group of P.O.W.'s) but is just as

The general public’s seeming inability to grasp the rules for this simple punctuation mark is a cause of despair to many people. ... The other place the apostrophe is used is in contractions.

Use the apostrophe to combine two words to make a contraction. For example, ... Indicate a break or pause within a sentence with the comma ( , ). This is another commonly used punctuation mark.

7. A punctuation mark which is used to separate lists or parts of sentences (clauses) which often already contain a comma...