Small marks change meaning. Learn quick tests, ready-to-use rewrites, and many wrong/right pairs you can copy into work, school, or casual writing.
If you only need to know whether a phrase is correct, paste the whole sentence into the examples section or run the three-step rewrite workflow below.
Quick answer: the Sainsbury's example and similar errors
If you mean the UK supermarket, write Sainsbury's (with an apostrophe). "Sainsburys" looks like a plural or a typo. Use the same test for contractions and possessives: expand contractions (it's → it is) and ask who owns what for possessives.
- Brand: Sainsbury's. Pluralize with a following noun: "Sainsbury's stores."
- It's vs its: expand "it's" to "it is" or "it has" to test.
- Their/there/they're: swap "they're" with "they are"; use "their" for ownership; "there" marks place or introduces clauses.
Core explanation: short rules to apply now
Speak the sentence aloud, expand contractions, ask "who owns this?", and read lists for natural pauses. Apply these rules in this order: contractions → possessives → homophones → punctuation.
- It's = it is / it has. Its = possessive.
- They're = they are. Their = possessive. There = place/introducer.
- Your = possessive. You're = you are.
- Apostrophes show possession or contractions, not plurals.
- Use a comma before a coordinating conjunction joining two independent clauses (or a semicolon).
- Hyphenate compound adjectives before nouns (e.g., price-match policy).
- Wrong: Its open until midnight.
Right: It's open until midnight. - Wrong: Their coming to the meeting later.
Right: They're coming to the meeting later.
Apostrophes and brand names (Sainsbury's and similar cases)
Follow the brand's spelling. Removing a brand's apostrophe usually reads as a mistake. To pluralize, rephrase: "Sainsbury's stores" rather than "Sainsburys."
- Correct: Sainsbury's.
Avoid: Sainsburys. - Pluralize with a noun: "Sainsbury's branches" or "Sainsbury's stores."
- Possessives on brands: rewrite if awkward ("Sainsbury's policy" instead of "Sainsbury's's policy").
- Wrong: Sainsburys price match policy changed.
Right: Sainsbury's price-match policy changed. - Wrong: I visited three Sainsburys last week.
Right: I visited three Sainsbury's stores last week. - Rewrite (work): Original: "Sainsburys Q2 results are due on Friday." → "Sainsbury's Q2 results are due on Friday."
- Rewrite (casual): Original: "Saw deals at Sainsburys today!" → "Saw deals at Sainsbury's today!"
- Rewrite (school): Original: "Sainsburys sponsored the trip." → "Sainsbury's sponsored the trip."
Punctuation, hyphenation and spacing: commas, hyphens, tidy text
Comma placement can change meaning. When omission creates ambiguity, use the serial (Oxford) comma. Hyphenate compound adjectives before nouns. Keep single spaces after periods and a single space after commas.
- Use the serial comma if it clarifies lists.
- Hyphenate: price-match policy, first-year students, well-known brand.
- Spacing: one space after periods; remove double spaces and ensure a space after punctuation.
- Wrong: I invited my parents, the manager and the director.
Right: I invited my parents, the manager, and the director. - Wrong: We need a price match policy update.
Right: We need a price-match policy update. - Wrong: We saw twenty one customers in the queue.
Right: We saw twenty-one customers in the queue. - Rewrite:
Original: "I need bread, butter and cheese." → "I need bread, butter, and cheese." (reduces misreading)
Examples: wrong/right pairs and rewrites for work, school, and casual use
Choose the corrected sentence and paste it into your document. Each wrong example is followed by corrected rewrites and a brief why-it-matters note.
Grouped by context: Work (formal), School (clear for graders), Casual (natural).
- Work:
Wrong: "Sainsburys sales figures will be released tomorrow." → "Sainsbury's sales figures will be released tomorrow." (brand apostrophe) - Work:
Wrong: "Your report needs to be submitted by Friday, your missing the deadline." → "Your report needs to be submitted by Friday; you're missing the deadline." (semicolon + contraction) - Work:
Wrong: "The projects timeline is attached." → "The project's timeline is attached." (possessive) - School:
Wrong: "Its important to cite your sources." → "It's important to cite your sources." (contraction test) - School:
Wrong: "The students report was thorough." → "The student's report was thorough." (one student) or "The students' report was thorough." (many students) - School:
Wrong: "Students hand in their essays on Monday." → "Students should hand in their essays by Monday." (clearer phrasing) - Casual:
Wrong: "Your going to love the deals at Sainsburys tonight." → "You're going to love the deals at Sainsbury's tonight." (contraction + brand) - Casual:
Wrong: "Their on their way with snacks." → "They're on their way with snacks." (contraction + possession) - Casual:
Wrong: "Sainsburys are offering buy one get one free." → "Sainsbury's is offering buy-one-get-one-free." (brand + hyphens) - Rewrite:
Original: "There seems to be too many people in the queue." → "There seem to be too many people in the queue." or "There is a long queue." - Rewrite:
Original: "I need twenty five volunteers." → "I need twenty-five volunteers."
Try your own sentence
Context matters. Paste the full sentence rather than a fragment-the surrounding words often reveal the correct form.
Rewrite help: a fast three-step workflow and direct rewrites
Workflow: 1) Read aloud. 2) Expand contractions. 3) Ask "who owns this?" If you're still unsure, rephrase to avoid the tricky part.
- If you see "it's" → expand to "it is" or "it has" to check. If it fits, keep the apostrophe.
- If you see "your/you're" → replace with "you are" to test; keep "your" only for ownership.
- If a compound adjective precedes a noun → add a hyphen.
- Rewrite:
Original: "Their is a notice on the door." → "There is a notice on the door." - Rewrite:
Original: "Its not clear who's responsible." → "It's not clear who's responsible." - Rewrite:
Original: "Sainsburys refunds policy needs updating." → "Sainsbury's refunds policy needs updating." - Rewrite:
Original: "I need twenty five volunteers." → "I need twenty-five volunteers."
Memory tricks and quick checks for a sticky note
Four quick checks catch most errors: contraction test, possession test, homophone swap, and list clarity check.
- Contraction test: expand "it's" → "it is." If it fits, keep it.
- Possession test: replace with "belongs to." If that reads naturally, use the possessive.
- Homophone swap: try "they are" for "they're," "you are" for "you're."
- List test: read the list aloud; if it pauses oddly, add the serial comma.
- Sticky-note: "Expand it's / replace they're / ask who owns this / read list aloud."
- Mnemonic: "If it is, use it's; if it owns, use its."
Similar mistakes to watch for (common clusters)
Errors often appear in groups. If you find one, check related areas: apostrophes, possessive vs plural, contractions, comma splices, and hyphenation.
- Apostrophe-as-plural: "cat's" (wrong) vs "cats" (right).
- Possessive plural vs singular: "manager's report" vs "managers' report" - count the owners.
- Comma splice: two clauses joined by just a comma - use a semicolon or add a conjunction.
- Hyphenation: compound adjectives before nouns need hyphens; numbers and words often use hyphens (twenty-five).
- Wrong: "The managers report is late."
Right: "The manager's report is late." (one) or "The managers' report is late." (many) - Wrong: "I went to the store, I bought apples."
Right: "I went to the store, and I bought apples." or "I went to the store; I bought apples."
FAQ
Is "common mistakes sainsburys" ever correct?
Not in edited English. It likely intends "common mistakes Sainsbury's" or "common mistakes about Sainsbury's." Include the apostrophe for the brand.
What should I use instead of "common mistakes sainsburys"?
Use a clear noun phrase: for example, "common mistakes about Sainsbury's" or "Sainsbury's common mistakes." Match the brand's spelling.
How can I check my full sentence?
Test the phrase inside the sentence. Nearby words show whether a contraction fits, whether something is possessive, and whether a comma belongs.
Why does the wrong version look plausible?
Speech often masks punctuation and possessives; what sounds acceptable aloud can still be wrong in writing.
Should I rely on spellcheck alone?
Spellcheck helps but doesn't catch sentence-level issues like wrong homophones, misplaced commas, or brand styling. Use the three-step workflow or a manual second read.
Want a fast second pair of eyes?
Use the three-step workflow above for one-off checks and keep a short style sheet for repeated content (brand spellings, serial comma preference, hyphenation rules).