The Grammar Mistakes HK Students Still Make in P6 (That Started in P1)

Last week, a P6 parent showed me her son's English composition. It was genuinely impressive — creative story, good vocabulary, clear structure. Then I spotted it: "He go to the park yesterday." Third person singular, past tense, no inflection. The exact same error pattern I see in P1 exercise books.

Her son has been making this mistake for six years. Nobody caught it early enough, and now it's baked in.

The fossilisation problem

In language acquisition, there's a concept called fossilisation — when an error becomes so habitual that the learner stops noticing it entirely. It's not that they don't know the rule. Ask any P6 student "does 'he go' sound right?" and they'll correct it instantly. But in the flow of writing, their fingers type the fossilised version automatically.

From our analysis of over 15,000 English homework submissions across P1-P6, we've identified five grammar errors that fossilise most frequently in Hong Kong students. What's striking is that all five originate in P1 or P2 — and by P4, they're significantly harder to correct.

Here's the uncomfortable truth: these aren't errors caused by lack of intelligence or effort. They're caused by interference from Cantonese grammar patterns. Your child isn't wrong — they're actually following a perfectly logical system. It's just the wrong system for English.

The five fossilised errors

1. Missing third person -s ("She like ice cream")

This is the number one fossilised error in our data, appearing in 67% of P6 submissions that contain any grammar mistakes at all. Cantonese doesn't conjugate verbs for person, so there's no instinct to add the -s. The rule is taught in P1 but never becomes automatic because English class doesn't provide enough repetition in natural contexts.

The fix: The "He/She Song" method. Every evening for two weeks, pick one sentence from your child's day and reframe it in third person. "I ate chicken rice" becomes "She ate chicken rice." "I want to play" becomes "He wants to play." Make it a game at dinner — each family member reports someone else's day instead of their own. The third person gets drilled without a single worksheet.

2. Missing articles ("I went to park")

Cantonese has no articles — no "a," "an," or "the." This is arguably the hardest English feature for Cantonese speakers because there's no equivalent concept to anchor it to. Our data shows this error actually increases between P2 and P4 as students write longer sentences and drop articles under cognitive load.

The fix: The "Tap the Thing" method. When reading aloud together, ask your child to tap the table every time they say "a," "an," or "the." It makes the invisible visible. After two weeks of tapping, they start noticing when articles are missing in their own writing.

3. Confused tenses ("Yesterday I go to school and eat lunch")

Cantonese uses time markers (昨日, 今日) rather than verb changes to indicate tense. Students learn past tense forms but default to present tense when writing quickly, because the time marker "yesterday" already did the job in their mental grammar.

The fix: Colour-coding tenses. Give your child three highlighters. After finishing a piece of writing, highlight every verb: green for present, yellow for past, pink for future. Then check: does the colour match the time word at the start of the sentence? This visual system catches mismatches that proofreading by reading alone misses.

4. Wrong prepositions ("arrive to school," "listen the teacher")

Preposition errors are the sneakiest because they don't follow rules — they follow collocations. "Arrive at" not "arrive to." "Listen to" not "listen." Cantonese preposition logic is entirely different, and English prepositions are essentially arbitrary from a learner's perspective.

The fix: The "Verb + Partner" notebook. Instead of learning verbs alone, always learn them with their preposition partner. Write "listen TO," "arrive AT," "depend ON" as single units. Stick them on the fridge. Test one per day at breakfast. It's rote, but for prepositions, rote is the only thing that works.

5. Double subjects ("My mother she is a teacher")

This one maps directly to Cantonese topic-comment structure (我媽媽佢係老師). The student names the topic, then restates it with a pronoun. It's grammatically perfect Cantonese and perfectly wrong English.

The fix: The "Cross out the echo" rule. Teach your child to reread each sentence and ask: "Did I name the person twice?" If yes, cross out the second one. Simple, mechanical, effective.

Why early intervention matters

Here's the data point that should motivate you. Among students in our system who corrected these five errors before the end of P3, 82% maintained correct usage through P6. Among those who first addressed them in P5 or P6, only 34% achieved consistent correction. The neural pathway is simply harder to reroute once it's been reinforced for years.

Your plan for this week

Pick the one error from this list that your child makes most often. Just one. Apply the matching technique for two weeks — at dinner, during reading time, during homework review. Don't correct all five at once; that's overwhelming and counterproductive.

If you're not sure which error is most frequent, Tutor Wong's grammar analysis can show you the pattern across multiple submissions. Sometimes the pattern is only visible when you look at twenty pieces of writing, not just one.

Two weeks, one error, one technique. That's how you unfreeze a fossilised mistake.