Grammar Practice Sentence Generator

Generates a random sentence containing a common grammar mistake for students to spot and correct — quick practice without writing new examples by hand. Ten fixed sentences, most with a single clear error.

Seed (optional)

The same word, at the same settings, gives the same result. It goes into the address when you generate, so a copied link opens with the word in the box. A seed is for repeatability, not secrecy.

Don't repeat what I've already seen

Your result will appear here.

What this generator does

Supplies a sentence to correct or analyse rather than a rule to learn, which is the practice half of grammar teaching. The punctuation practice generator does the same for punctuation specifically.

What you'll get

This generator draws from a hand-checked list of 10 entries. Here is a spread of 6 of them, so you can see the style before you generate:

Find the error: 'Me and him went to the store yesterday.'
Find the error: 'Their going to the beach this weekend.'
Find the error: 'The dog wagged it's tail happily.'
Find the error: 'Each of the students brought their own pencil case.' (Is 'their' correct here? Discuss.)
Find the error: 'I could of finished it sooner.'
Find the error: 'Who's book is this?'

A fixed sample of the list, not a live draw — your own results are picked at random from all 10, without repeating until the list runs out. Original HEKNO-curated grammar practice sentences with a deliberate error to spot. Last reviewed 2026-08-03.

How to use this tool

Press generate for a sentence.
Find and correct the error, then generate again.

Common use cases

English/language arts practice
Proofreading exercises
Quick classroom warm-ups

How this generator works

Draws one of ten fixed sentences, each written around a specific, common error — its/it's, their/there/they're, subject-verb agreement — with a seed word available to bring the same sentence back for a repeated exercise. The seed path swaps in a repeatable, non-cryptographic sequence in place of the secure one.

Limitations and good to know

Two of the ten sentences are deliberately disputed usage rather than a clear-cut error — one flags 'the team are playing well' as a British/American difference, and one asks whether 'their' is really wrong for a singular 'each' — so answering those two needs a class discussion, not a single correction.
Ten sentences will repeat within a short run of daily warm-ups; there is no record of which ones a class has already corrected.

Practical tips

Ask pupils to explain the correction as well as making it — a fix without a reason does not transfer to the next sentence.
Use one sentence well rather than ten quickly; the discussion is where the learning happens.

Entries are chosen with your browser's cryptographic random number generator, so every entry on the list is equally likely. How Generate Random works.