Should I put a comma before the word “too”?

Someone just asked this question, and the answer is “yes.” 

Most of the time, at least. 

When to use a comma —When you use “too” in the adverb sense of saying “also,” “likewise,” or “as well,” the word should always be set off from the rest of the sentence with commas.

I want to go, too.

I, too, want to go.

Too, I want to go.

The same usually goes for the words “also,” “likewise,” and “as well.”  Here, though, you need to think about the “sound” of your sentence and normal usage practice in similar sentences.  “Also” seems to vary in its usage.  It is set off by commas at the beginning or end of a sentence, but not necessarily in the middle.

Also, Bill wants to go.

Bill also wants to go.

Bill wants to go, also.

In a related adverb use, sometimes “too” modifies a verb in a way that emphasizes opposition to a previous negative statement.  You would also use a comma here.  Ironically, though, you wouldn’t use a comma in the opposite case, where you were emphasizing opposition to a previous positive statement.

TOO (uses comma)

Bill doesn’t want to go.

He does, too!

NOT (doesn’t use comma)

Bill wants to go.

He does not!

When NOT to use a comma — Sometimes “too” is used as a “degree” adverb.  In this case it doesn’t modify a verb but instead modifies an adjective or another adverb.  In sentences like these, you would NOT set off the “too” with a comma.

The pan is too hot. (modifies the adjective “hot”)

The train is moving too slowly. (modifies the adverb “slowly”)

So, to summarize: if your “too” means “also,” use a comma.  If your “too” means “very,” “excessively,” or “extremely,” do not use a comma.

COMMA: I want to go, too (also).

NO COMMA: I arrived too (excessively) late to catch the train

I hope this is helpful!

About Katherine Wikoff

I am a college professor at Milwaukee School of Engineering, where I teach literature, film studies, political science, and communication. I also volunteer with a Milwaukee homeless sanctuary, Repairers of the Breach, as chair of the Communications and Fund Development Committee.
This entry was posted in Grammar, punctuation, usage, mechanics and tagged , , , , , , , . Bookmark the permalink.

5 Responses to Should I put a comma before the word “too”?

  1. Pingback: Adverb |

  2. hello… this is informative, useful and clearly put, ma’am. very nice post, thanks.

    warm regards, too. did i get that right? 😉


  3. Mary Lannon says:

    The Chicago Manual of style would disagree with you. Also, ‘also’ is a conjunctive adverb, but ‘too’ is not a conjunctive adverb, so you use a comma after ‘also’ because it is a conjunctive adverb but not after ‘too’ because it is not a conjunctive adverb. You can use ‘also’ at the beginning of a sentence because it’s a conjunctive adverb but not ‘too.’


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