Common Grammar Mistakes to Avoid

A very common mistake is using a plural verb with a singular subject, or the other way round. The subject and verb must agree in number. For example, say "The team is winning" not "The team are winning" in standard British English, because "team" is treated as a singular group noun.

Be especially careful when the subject is long or when other nouns appear nearby. In "The pile of documents is on the desk", the real subject is "pile", not "documents". The sentence is singular, so "is" is correct. A quick check is to find the main subject first, then choose the verb to match it.

Some subjects look plural but are singular in meaning. "News", "mathematics", and "physics" take singular verbs: "The news is good", "Mathematics is useful". Avoid being distracted by words that only look plural.

Apostrophes are often used where they do not belong. One of the biggest mistakes is writing a plural with an apostrophe, such as "apple's" when you mean more than one apple. The correct plural is simply "apples". Apostrophes are usually for possession or omission.

Use an apostrophe for possession: "the child's coat", "the teachers' room", "James's bike" in most British styles. For contractions, use the apostrophe to show missing letters: "don't", "it's", "we're". Remember that "its" without an apostrophe is possessive, while "it's" means "it is" or "it has".

A good test is to ask whether the apostrophe shows ownership or a missing letter. If neither is true, it probably should not be there. "The dog's bowl" is correct if the bowl belongs to the dog; "The dogs barked" needs no apostrophe.

Homophones sound alike but mean different things, so they are easy to mix up in writing. "Your" shows possession: "Your keys are on the table." "You're" is short for "you are": "You're late again." If you can replace the word with "you are", then "you're" is correct.

The same idea works for "there" and "their". "There" refers to a place or introduces a sentence: "Put the box over there" or "There is a problem." "Their" shows possession: "Their bus has arrived." The word "its" is possessive, while "it's" means "it is" or "it has".

A useful memory trick is to expand the shortened form. "You're" becomes "you are"; if that does not fit, use "your". Likewise, if "it is" fits, choose "it's"; if not, use "its".

Pronouns should clearly point to the noun they replace. A vague sentence such as "When Lucy spoke to Maya, she was upset" leaves the reader guessing who was upset. Rewrite it so the meaning is obvious: "When Lucy spoke to Maya, Lucy was upset" or "When Lucy spoke to Maya, Maya was upset."

Another common error is using the wrong pronoun case. Say "He gave the book to me" and "The winner was she" in formal writing, not "to I" or "was her". A simple method is to remove the other person from the sentence. You would say "He gave the book to me", so "me" is correct.

Keep pronouns close to the nouns they refer to. If a sentence could be read in two ways, reword it. Clarity matters more than sounding clever.

Commas do not create complete sentences. A sentence such as "Because it was raining, we stayed inside" is fine, but "Because it was raining" by itself is only a fragment. It needs a main clause to make a full thought.

Run-on sentences happen when two full sentences are pushed together without proper punctuation. "I finished my homework I watched television" should be written as "I finished my homework, and I watched television" or "I finished my homework. I watched television." The comma alone is not enough unless the sentence is joined by a suitable conjunction.

Use commas to separate items in a list, to set off extra information, and after introductory phrases when needed. But do not scatter commas everywhere. Read the sentence aloud and check whether it has one complete thought or two.

Here is a quick way to review the most common everyday errors: subject-verb agreement, apostrophes, your and you're, there and their, its and it's, pronoun clarity, pronoun case, fragments, run-ons, missing commas in lists, misuse of singular and plural forms, and confusion between adjectives and adverbs. For example, say "She sings beautifully", not "She sings beautiful".

A memorable rule can help: ask three questions before you finish a sentence. Does the verb match the subject? Does the apostrophe show possession or omission? Could any pronoun be mistaken for another noun? If the answer is unclear, revise the sentence.

Editing slowly is often the best grammar tool. Even strong writers miss small errors on a first draft, but a careful second look can catch them. Try reading your work aloud, because your ear often notices problems that your eye skips over.