If they show joint possession, add 's to the last word. Youngman's and Mason's comedy techniques are similar. The child recovered despite her mother and father's neglect. Don't mistakenly add an apostrophe to form the plural. The unleashed dogs began traveling in a pack.
Omissions Use an apostrophe to indicate omission in a contraction to to form particular plurals.
That sentence has too many but's. He made two A's and three B's this semester. Use the colon to introduce and to separate. The colon also has several conventional uses, such as in expressions of time. Use a colon to introduce a concluding explanation, series, appositive, or long or formal quotation.