Tense Consistency in Writing: The Most Common English Error in HK Primary Exams

If I were to name the single most common grammar error in P4–P6 English writing — not the most complex, but the most frequent — it would be tense inconsistency. Students begin a story in past tense, drift into present, slide back to past, and finish in what might charitably be described as a grammatical time-blur.

"Last Saturday, Tom went to the park. He sees his friend Peter there. They were playing football when suddenly a big dog runs towards them. Tom was scared and runs away."

The tenses here shift four times in four sentences. The story is understandable but grammatically chaotic, and it costs marks on every writing task.

Why This Happens

Tense consistency is genuinely harder for Cantonese-speaking learners than it might appear to native English speakers.

In Cantonese, verbs do not change form to indicate tense. Tense is indicated through time expressions (琴日 — yesterday, 聽日 — tomorrow, 而家 — now) rather than through verb inflection. The verb 去 means "go" regardless of whether you went yesterday, are going now, or will go tomorrow. The verb itself is unchanged.

In English, every sentence requires a tense decision embedded in the verb form. This is a constant, ongoing grammatical demand that has no equivalent cognitive habit in Cantonese. When a child is concentrating on what to say — the story content, the vocabulary, the spelling — the tense monitoring gets switched off. The result is tense drift.

The narrative present is seductive. When children are excited about a story and retelling it, they naturally slip into present tense because narrative present is vivid and immediate. "And then he RUNS and the dog JUMPS and it's SO scary!" is how children naturally tell stories orally. Maintaining written past tense requires a deliberate override of this natural storytelling register.

The Golden Rule: Decide Your Tense Before You Write

The most effective intervention is simple and preventive: before writing a single word, decide the tense and write it at the top of the page.

"This is a story in PAST TENSE."

This seems almost comically basic. But it works. It externalises the tense commitment so the child has a reference point to return to — especially during editing.

For P4–P6, the general guidance is:

• Narratives (stories, diary entries, recounts): Past tense throughout
• Present descriptions (describing a picture, describing your school): Present tense throughout
• Instructions and procedures: Imperative (no tense problem)
• Opinion essays: Present tense throughout
• Formal letters: Present tense throughout (unless recounting a specific past event)

The Main Tense Pairs That Get Confused

Simple past vs. simple present:

• Past: She walked to school.
• Present: She walks to school.

Simple past for narratives about the past. Simple present for general truths, habits, and descriptions of now.

Past continuous vs. present continuous:

• Past continuous: They were playing when the storm started.
• Present continuous: They are playing in the garden.

When a narrative is in past tense, the background action or ongoing activity uses past continuous (were + -ing).

Past simple vs. past continuous in the same sentence:

• She was reading (past continuous: the background action) when the phone rang (past simple: the event that interrupted).

This pattern is very commonly tested at P5–P6 level. The tense combination itself becomes the grammar point, not just consistency.

Teaching the Editing Habit

Once a draft is written, teach a specific tense-checking editing pass:

1. Read through the piece highlighting every verb.
2. Check each highlighted verb against the decided tense.
3. Correct any that do not match.

This is done as a separate pass after the composing is complete. Trying to monitor tense while simultaneously composing is cognitively overloading — separate them.

A parent can model this with an annotated correction:

"Look at this sentence: 'Tom went to the market and then he sees his mother.' The story is in past tense — we decided at the top. 'Went' is past tense — correct. 'Sees' is present tense — that needs to be 'saw.' Can you fix it?"

Rather than just giving the correction, walk through the logic. The child needs to internalise the checking process, not just receive corrected answers.

When Tense Changes Are Correct

There is one situation where tense changes within a piece are grammatically appropriate: when shifting between a general truth (present) and a specific past event (past).

"Scientists say that climate change is accelerating (present: general truth). Last year, Hong Kong recorded its highest ever temperature (past: specific event)."

This kind of tense shift is sophisticated and deliberate. At P4–P5 level, I do not emphasise this — the priority is getting the primary narrative or argument tense consistent. At P6, noting when tense shifts are legitimate (and when they are errors) becomes relevant.

A Useful Error-Correction Exercise

Give your child a short paragraph written with deliberate tense errors — or use a passage from their own previous work. Ask them to:

1. Identify the intended tense of the passage
2. Underline every verb
3. Correct any verbs that do not match the intended tense

Do this regularly — not just with English writing, but with short practice paragraphs you write specifically for this purpose. The ability to detect tense errors in someone else's writing directly builds the ability to self-monitor in their own.

Tense consistency is ultimately a habit of attention. Like capital letters at the start of sentences and full stops at the end, it needs to become automatic — which comes from regular, deliberate practice with feedback. Once it is automatic, it frees up cognitive bandwidth for the things that matter more: vocabulary, ideas, and structure.