James Ashworth
You have a sharp argument or a story worth telling. Then a stray apostrophe or a comma splice trips the reader, and suddenly they are judging your credibility instead of engaging with your words. The good news is that most grammar mistakes are not signs of carelessness; they are habits nobody explained clearly. Here are the errors I see most often in blog posts, articles and freelance copy, with quick fixes you can apply today.
Why Small Errors Undermine Big Ideas
Grammar is not about showing off. It is about removing friction. When punctuation is correct, readers glide through your sentences. When it is wrong, they stumble — and a stumble is a tiny moment of doubt. That doubt costs you authority. In freelance writing, clean prose is a competitive advantage. You do not need to be a pedant; you just need the handful of rules that cause the most confusion.
The Apostrophe: When to Add and When to Leave Out
The apostrophe has two jobs: showing possession and marking missing letters. Mixing them up is the most common error in British blogging.
- Its vs it's. Its means belonging to it (the company lost its licence). It's means it is or it has (it's raining). If you can substitute "it is", use the apostrophe.
- Your vs you're. Your is possession (your draft). You're is you are (you're welcome). Test with the full phrase.
- Their, there and they're. Their belongs to them. There is a place or filler. They're is they are.
- Plurals do not need apostrophes. Two decades ago, not two decade's ago. The 1990s, not the 1990's.
Fix: replace the contraction with its full form. If the full form works, keep the apostrophe. If not, remove it.
Comma Splices, Run-Ons and How to Break Them
A comma splice joins two complete sentences with only a comma: "I finished the draft, I sent it to the client." Each half could stand alone. A run-on does the same without punctuation: "I finished the draft I sent it to the client." Both make the reader work too hard.
You have four clean fixes:
- Full stop: I finished the draft. I sent it to the client.
- Semicolon: I finished the draft; I sent it to the client.
- Conjunction: I finished the draft, and I sent it to the client.
- Subordinating conjunction: After I finished the draft, I sent it to the client.
Do not use a comma alone. That is the whole rule.
Subject-Verb Agreement: Finding the Real Subject
Most agreement errors happen when words crowd between the subject and the verb. "The box of old magazines were in the attic" sounds fine until you spot that the subject is box, not magazines. The verb should be was.
Watch for these traps:
- Prepositional phrases. Cross them out mentally. The team of players is ready.
- Either/or and neither/nor. The verb agrees with the nearest subject. Neither the manager nor the assistants were available.
- Collective nouns. In British English, groups like team or government can take a singular or plural verb depending on whether you mean the unit or its members. Be consistent.
- There is / there are. The real subject comes after the verb. There are three reasons, not there is three reasons.
Fix: locate the subject, ignore everything between it and the verb, and match them.
Modifiers That Wander Off (and How to Tether Them)
A modifier describes something else. When it is misplaced, the sentence says something you did not intend.
- Dangling modifier: "Having finished the report, the coffee went cold." The coffee did not finish the report. Fix: "Having finished the report, I let the coffee go cold."
- Misplaced "only": "She only edits on Fridays" suggests she does nothing else. "She edits only on Fridays" means Friday is the sole day. Put only directly before the word it limits.
- Squinting modifier: "Students who revise quickly improve" is ambiguous. Does quickly modify revise or improve? Rewrite: "Students who revise quickly tend to improve."
Fix: place descriptive words as close as possible to what they describe. If a sentence can be read two ways, rewrite it.
A Practical Proofreading Routine
You will not catch these errors while drafting. That is normal. Build a short editing pass instead.
- Read aloud. Your ear catches comma splices and missing words faster than your eye.
- Search for contractions. Use find for "it's", "you're" and "they're". Check each one.
- Check every apostrophe. Ask: possession or missing letters? If neither, delete it.
- Find the verb in every sentence. Then find its subject. Match them.
- Split long sentences. If a sentence runs past three lines, break it. Most run-ons hide there.
- Leave it overnight. Fresh eyes catch what tired eyes miss at midnight.
None of this requires a degree in linguistics. It requires a few deliberate passes and the willingness to slow down. Your ideas deserve that care — and your readers will thank you for it.
