20 Common Grammar Mistakes That (Almost) Everyone Makes

This post, by John Gingerich, originally appeared on Lit Reactor on 1/31/12.

I’ve edited a monthly magazine for more than six years, and it’s a job that’s come with more frustration than reward. If there’s one thing I am grateful for — and it sure isn’t the pay — it’s that my work has allowed endless time to hone my craft to Louis Skolnick levels of grammar geekery. 

As someone who slings red ink for a living, let me tell you: grammar is an ultra-micro component in the larger picture; it lies somewhere in the final steps of the editing trail; and as such it’s an overrated quasi-irrelevancy in the creative process, perpetuated into importance primarily by bitter nerds who accumulate tweed jackets and crippling inferiority complexes. But experience has also taught me that readers, for better or worse, will approach your work with a jaundiced eye and an itch to judge. While your grammar shouldn’t be a reflection of your creative powers or writing abilities, let’s face it — it usually is.

Below are 20 common grammar mistakes I see routinely, not only in editorial queries and submissions, but in print: in HR manuals, blogs, magazines, newspapers, trade journals, and even best selling novels. If it makes you feel any better, I’ve made each of these mistakes a hundred times, and I know some of the best authors in history have lived to see these very toadstools appear in print. Let’s hope you can learn from some of their more famous mistakes.

Who and Whom

This one opens a big can of worms. “Who” is a subjective — or nominative — pronoun, along with "he," "she," "it," "we," and "they." It’s used when the pronoun acts as the subject of a clause. “Whom” is an objective pronoun, along with "him," "her," "it", "us," and "them." It’s used when the pronoun acts as the object of a clause. Using “who” or “whom” depends on whether you’re referring to the subject or object of a sentence. When in doubt, substitute “who” with the subjective pronouns “he” or “she,” e.g., Who loves you? cf., He loves me. Similarly, you can also substitute “whom” with the objective pronouns “him” or “her.” e.g., I consulted an attorney whom I met in New York. cf., I consulted him.

Which and That

This is one of the most common mistakes out there, and understandably so. “That” is a restrictive pronoun. It’s vital to the noun to which it’s referring.  e.g., I don’t trust fruits and vegetables that aren’t organic. Here, I’m referring to all non-organic fruits or vegetables. In other words, I only trust fruits and vegetables that are organic. “Which” introduces a relative clause. It allows qualifiers that may not be essential. e.g., I recommend you eat only organic fruits and vegetables, which are available in area grocery stores. In this case, you don’t have to go to a specific grocery store to obtain organic fruits and vegetables. “Which” qualifies, “that” restricts. “Which” is more ambiguous however, and by virtue of its meaning is flexible enough to be used in many restrictive clauses. e.g., The house, which is burning, is mine. e.g., The house that is burning is mine.

Lay and Lie 

This is the crown jewel of all grammatical errors. “Lay” is a transitive verb. It requires a direct subject and one or more objects. Its present tense is “lay” (e.g., I lay the pencil on the table) and its past tense is “laid” (e.g., Yesterday I laid the pencil on the table). “Lie” is an intransitive verb. It needs no object. Its present tense is “lie” (e.g., The Andes mountains lie between Chile and Argentina) and its past tense is “lay” (e.g., The man lay waiting for an ambulance). The most common mistake occurs when the writer uses the past tense of the transitive “lay” (e.g., I laid on the bed) when he/she actually means the intransitive past tense of “lie" (e.g., I lay on the bed).


Contrary to common misuse, “moot” doesn’t imply something is superfluous. It means a subject is disputable or open to discussion. e.g., The idea that commercial zoning should be allowed in the residential neighborhood was a moot point for the council.

Continual and Continuous

They’re similar, but there’s a difference. “Continual” means something that’s always occurring, with obvious lapses in time. “Continuous” means something continues without any stops or gaps in between. e.g., The continual music next door made it the worst night of studying ever. e.g., Her continuous talking prevented him from concentrating.

Envy and Jealousy


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