We have learned to place commas around parenthetical expressions — an expression that is just added words and not part of the sentence structure: "The team played, in my opinion, their best game." Parentheses can also be used to set off parenthetical expressions. Parentheses show a greater degree of separation than the use of the comma: "The team played (in my opinion) their best game."
Practice What You've Learned
Each sentence below contains a parenthetical expression. Insert parentheses in each sentence by clicking the space between the words where you desire parentheses to be.