Question Tags in English: Why HK Students Always Get Them Wrong

"You like swimming, isn't it?" "She's very clever, don't you think?" "We should go now, right?"

If you have a child in P3 to P6, you have probably heard something like these sentences. The first two are direct errors — common question tag mistakes made by Cantonese-speaking learners. The third is technically acceptable in informal English but reflects the pull toward simpler alternatives.

Question tags are genuinely one of the trickiest grammatical structures in English for Cantonese-first learners, and the reason is structural: Cantonese uses 係唔係 (is it not?) or 好唔好 (good or not?) as all-purpose question tags regardless of the sentence structure. English uses a system that requires the tag to match the auxiliary verb in the statement — and if there is no auxiliary verb, one must be supplied.

This article explains the system clearly and offers strategies for teaching it.

How English Question Tags Work

A question tag consists of:

1. An auxiliary verb (matching the verb in the main clause)
2. A pronoun (matching the subject of the main clause)

The polarity is typically reversed: if the main clause is positive, the tag is negative. If the main clause is negative, the tag is positive.

Positive statement → negative tag:

• She is clever, isn't she?
• They have finished, haven't they?
• You can swim, can't you?
• He went to school, didn't he?

Negative statement → positive tag:

• He isn't coming, is he?
• You haven't eaten, have you?
• They can't hear us, can they?

The Main Challenge: Finding the Right Auxiliary

The part that trips up most HK students is identifying which auxiliary verb to use.

If the statement contains an auxiliary verb (is, are, was, were, has, have, had, can, could, will, would, should, must, might), use that same auxiliary in the tag.

• She is reading, isn't she?
• They will help, won't they?
• He has gone, hasn't he?

If the statement has no auxiliary verb (simple present or simple past with a main verb), use do/does/did:

• She reads every night, doesn't she?
• They finished early, didn't they?
• He likes football, doesn't he?

This is the step most commonly missed. Children say "He likes football, isn't he?" because they default to isn't as a general-purpose tag (influenced by Cantonese 係唔係). The correct tag is doesn't he — because the main verb is likes (simple present, third person singular), so the do-support auxiliary is does, negated to doesn't.

The Most Common Errors in HK Students' Writing and Speech

Error 1: Using "isn't it" for everything

• Wrong: She likes dancing, isn't it?
• Right: She likes dancing, doesn't she?

Error 2: Wrong pronoun

• Wrong: My parents are at home, isn't it?
• Right: My parents are at home, aren't they?

Error 3: Wrong polarity (same polarity as statement)

• Wrong: He is coming, isn't he coming? or She didn't finish, didn't she?
• Right: He is coming, isn't he? / She didn't finish, did she?

Error 4: Ignoring contraction rules

• Wrong: They will go, willn't they?
• Right: They will go, won't they?

Irregular contractions to memorise:

• will → won't (not "willn't")
• am → aren't I (not "amn't I") — this is a genuine oddity of English
• can → can't
• shall → shan't

Teaching the System Step by Step

I use a three-step checklist with my students:

Step 1: Find the auxiliary in the main clause. If there is none, add do/does/did mentally.

She works hard. → No auxiliary → use does (third person singular present)

Step 2: Reverse the polarity.

She works hard. → positive statement → negative tag → doesn't

Step 3: Match the pronoun to the subject.

Subject is she → pronoun is she

Result: She works hard, doesn't she?

Practise this as a three-step mechanical process first. Once children can do it mechanically with simple sentences, the pattern begins to feel natural.

A Table of Common Patterns

Statement	Tag
She is happy,	isn't she?
They aren't coming,	are they?
He was there,	wasn't he?
You have seen it,	haven't you?
They hadn't left,	had they?
She can speak French,	can't she?
You will help,	won't you?
He likes maths,	doesn't he?
They speak English,	don't they?
She went home,	didn't she?

Why This Matters for Exams

Question tags appear in P4–P6 grammar papers and in the language use sections of school exams. They are also assessed in TSA at P6 level within grammar accuracy tasks. In oral assessments, using question tags naturally (however imperfectly) signals a higher level of English interaction.

At primary level, I focus on the three most common patterns: is/isn't, do/don't/does/doesn't, and did/didn't. The full range of auxiliaries can be extended in S1 and beyond.

The honest message for parents: this is hard. Question tags are one of the genuinely complex structures in English, and they remain a challenge for even advanced non-native speakers. Persistent errors in question tags at P4–P5 are normal. Targeted, systematic practice of the three-step process above is the most effective approach — not hoping it will be absorbed naturally.