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KN Origin Lab/Language engineering/English

KN English Systems

Academic English · IELTS

A controlled learning architecture that converts language foundations into communication performance, then validates that performance through IELTS-style evidence and diagnosis.

Active moduleOperational

Grammar Lab

Sentence control from core structures to academic grammar.

KN Programme Architecture

Signal-to-performance pipeline

3 LAYERS · 12 MODULES
L01

Language control

Form and meaning

L02

Communication loop

Listen · Speak · Read · Write

L03

IELTS validation

Measure and diagnose

INPUT → CONTROL → PERFORMANCE → FEEDBACKLOOP CLOSED
Mastery check pending
GS6.04CEFR B1Clause expansion and transformation

Reported speech

Reported speech re-anchors tense, pronouns and time/place expressions to the reporter's viewpoint while preserving the original proposition.

01 · Concept foundation

Understand the terms before applying the rule

Each term below names a different grammatical object. Open examples and compare their function rather than memorising a Vietnamese translation alone.

T01

reported speech/rɪˈpɔːtɪd spiːtʃ/

lời nói gián tiếp

A construction representing another person's words or thoughts without necessarily quoting them exactly.

The authors stated that the method was reliable.

Các tác giả cho biết phương pháp đáng tin cậy.

T02

reporting verb/rɪˈpɔːtɪŋ vɜːb/

động từ tường thuật

A verb introducing a report and often controlling the complement pattern and stance.

state that, claim that, suggest doing

nêu rằng, khẳng định rằng, đề xuất làm

T03

deixis/ˈdaɪksɪs/

chỉ xuất

Expressions whose interpretation depends on speaker, time or place, such as now, here and this.

today → that day; here → there

hôm nay → hôm đó; ở đây → ở đó

Complete lesson scope

Do not stop at one formula

4 coverage areas
1

Reported statements, questions, commands and requests

2

Backshift, pronoun change and time/place deixis

3

Reporting verbs and their complement patterns

4

No-backshift contexts and preservation of current truth

Decision boundary: Backshift follows viewpoint and relevance; it is not an automatic replacement table.

02 · Controlling rule

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.

Structural formulasay + (that) clause | tell + object + clause/to-infinitive | ask + if/whether/wh-clause | reporting verb + that/to/-ing/preposition pattern
GS6 · Clause expansion and transformation laboratory

Reported speech: viewpoint, evidence and reporting-verb patterns

Report statements, questions, requests and research claims while controlling tense, pronoun, time/place reference, information source and the complement pattern selected by each reporting verb.

Decision modules4Meaning → form → discourse
Scientific decision model

Reported speech rebuilds an earlier message from a new reporting viewpoint. Backshift is not blind tense replacement; it depends on the reporting time, current truth, discourse purpose and the selected reporting verb.

Say, tell, ask, advise, suggest, admit, deny, promise, warn and claim are not interchangeable. They select different grammatical complements and different stances. In academic writing, a reporting verb also evaluates the source: demonstrate is stronger than suggest; claim can create distance; acknowledge signals concession.

1

Is the original message a statement, yes/no question, wh-question, command, request, promise, warning or claim?

2

Has the reporting viewpoint changed enough to require tense, pronoun or time/place shift?

3

Which complement pattern does the reporting verb license?

4

Does the writer need neutral attribution, agreement, doubt, criticism or evidence strength?

Active knowledge module

1. Statements, backshift and viewpoint

A past reporting verb commonly shifts present to past, past to past perfect and will to would. Backshift may be unnecessary when the report is immediate, the reporting verb is present, or the proposition remains valid and the writer deliberately keeps current relevance.

said (that) + backshifted clause · says/has said (that) + current viewpoint
RULE 01

Present simple commonly becomes past simple after a past reporting verb: is → was, works → worked.

RULE 02

Past simple commonly becomes past perfect when anteriority matters: went → had gone.

RULE 03

Do not backshift a statement merely because it contains that; the reporting frame controls the shift.

RULE 04

Keep present tense when reporting established knowledge from a current source if current validity is intended.

The operator said that the sensor was malfunctioning.

The operator said that the sensor was malfunctioning.

Was malfunctioning reflects the earlier ongoing situation from a later reporting point.

The report states that sea level rise increases flood exposure.

The report states that sea level rise increases flood exposure.

Present reporting verb and present proposition frame the claim as currently valid.

Reported statement

say/tell/report + (that) + clause

Reconstruct a proposition from a new viewpoint.

She said that the model was ready.

He told us that the test had failed.

  • Tell normally requires an object; say normally does not take that object directly.

Reported question

ask + wh-word/if/whether + subject + verb

Report information sought without direct-question inversion.

She asked where the data were stored.

He asked whether the file was complete.

  • Use statement order and no internal question mark.

Reported directive

tell/ask/advise/warn/remind + object + (not) to + V

Report an instruction, request, recommendation or warning.

The supervisor reminded us to label every sample.

  • Select the verb by speech act and degree of force.

Academic source reporting

source + reporting verb + that-clause/noun phrase

Attribute evidence, method, interpretation or disagreement.

The study demonstrates that...

The authors question whether...

  • Match verb strength to evidence and your stance toward the source.

say versus tell

She said that the model was ready.

Say introduces content without a direct indirect-object pattern.

She told the team that the model was ready.

Tell identifies the recipient.

Use say + content; use tell + recipient + content.

Past viewpoint versus current validity

The witness said that the gate was open.

The report locates the state in the earlier situation.

The manual states that the gate is open during maintenance.

A current source presents a currently valid rule.

Backshift follows viewpoint, not a universal command to make everything past.

cautious versus strong reporting

The results suggest that the parameter may be unstable.

Tentative interpretation.

The experiment demonstrates that the material fails above 80°C.

Strong evidence claim.

Do not use a stronger reporting verb than the evidence supports.

Communication and IELTS use

Conversation and IELTS Speaking

Prefer
Use simple said/told/asked patterns to recount experiences, and preserve natural current truth where appropriate.
Avoid
Over-backshifting every clause or using formal verbs that sound unnatural in personal storytelling.
Why
Spoken reporting prioritises clear sequence and speaker identity.

IELTS Writing Task 2 and academic writing

Prefer
Use named sources and reporting verbs calibrated to evidence: argues, suggests, demonstrates, acknowledges, questions.
Avoid
It is said that without a source, or verbs that overstate certainty.
Why
Source visibility and stance are part of academic integrity.

Technical meetings and documentation

Prefer
Report decisions, actions and responsibility with precise verbs: instructed, confirmed, warned, requested, agreed.
Avoid
Ambiguous pronouns that obscure who committed to which action.
Why
Operational reporting must preserve traceability.
English–Vietnamese contrast

Do not translate markers mechanically: reconstruct the relation and viewpoint

Tense backshift

English

Finite tense often shifts relative to a past reporting point, unless current validity or reporting context justifies keeping it.

Tiếng Việt

Vietnamese verbs do not inflect for tense in the same way; đã/đang/sẽ and context carry temporal relations.

When translating, reconstruct the reporting timeline rather than copying each Vietnamese time word.

Indirect question order

English

Reported questions use statement order and no do-support/inversion.

Tiếng Việt

Question words often remain in a similar surface position because Vietnamese does not use auxiliary inversion.

Vietnamese learners must actively remove English direct-question inversion inside the reported clause.

Common viewpoint shifts

These are defaults, not automatic replacements detached from context.

OriginalCommon reportCondition
present simplepast simplepast reporting viewpoint
past simplepast perfectanteriority needs marking
willwouldfuture viewed from past
can/may/mustcould/might/had tomeaning permits shift

Reporting verb pattern map

Learn the verb together with its complement pattern and stance.

PatternCommon verbsExample
verb + thatsay, claim, argue, acknowledgeThe authors argue that...
verb + to Vpromise, refuse, agree, offerThey agreed to revise it.
verb + O + to Vadvise, warn, remind, tellShe warned us not to proceed.
verb + V-ingadmit, deny, suggestHe admitted changing the file.
verb + prep + V-ingapologise for, insist on, accuse O ofThey apologised for delaying the test.
High-risk errors

She told that the model was ready.

She said that the model was ready. / She told us that the model was ready.

Tell normally requires a recipient object.

He asked where was the file stored.

He asked where the file was stored.

Reported questions use statement order.

The reviewer suggested us to repeat the test.

The reviewer suggested repeating the test. / The reviewer suggested that we repeat the test.

Suggest does not normally take object + to-infinitive.

They promised revising the report.

They promised to revise the report.

Promise normally takes a to-infinitive.

Guided practice

Choose by relation, viewpoint and discourse role

0/4

1. Which sentence uses correct indirect-question order?

2. Which reporting verb pattern is correct?

3. Which verb gives the most cautious evidence claim?

4. Which form correctly reports a promise?

Transfer task

Report one personal conversation for Speaking, one technical meeting decision and two academic source claims using reporting verbs of different strength. Explain every tense/reference shift and complement pattern.

1

Statement, question or directive structure matches the original speech act.

2

Backshift and reference shifts follow the reporting viewpoint.

3

The reporting verb licenses the complement that follows.

4

Source identity and evidential strength remain transparent.

03 · Worked examples

Observe form, function and meaning together

EX01

The analyst said that the peak had occurred before the gauge failed.

Nhà phân tích nói rằng đỉnh đã xảy ra trước khi máy đo hỏng.

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.
EX02

The reviewer asked whether the uncertainty had been quantified.

Người phản biện hỏi liệu độ bất định đã được định lượng hay chưa.

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.
EX03

The supervisor told the team to document every assumption.

Người hướng dẫn yêu cầu nhóm ghi lại mọi giả định.

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.
EX04

The authors acknowledged that the validation period was short.

Các tác giả thừa nhận rằng giai đoạn kiểm định ngắn.

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.
EX05

Recent studies suggest that compound flooding is becoming more frequent.

Các nghiên cứu gần đây cho thấy ngập lụt tổng hợp đang trở nên thường xuyên hơn.

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.
EX06

The agency denied withholding the metadata.

Cơ quan phủ nhận việc giữ lại siêu dữ liệu.

Reported speech reconstructs a message from a new reporting viewpoint. Backshift is common after a past reporting verb when the original proposition is viewed from an earlier time, but it is not a blind replacement rule: current truths, unchanged facts and immediate reporting may retain their original tense. Statements use declarative order; reported questions remove do-support and inversion; requests and commands normally use object + to-infinitive. Reporting verbs also encode evidential force, agreement, doubt, advice or responsibility.

04 · High-risk contrast

Explain why one form fails, not only which answer is correct

Incorrect

She asked why did the model fail.

Repaired

She asked why the model had failed.

A reported question is embedded inside a larger clause, so it uses statement order and no do-support. Past perfect is appropriate here because the failure occurred before the past act of asking.

05 · Mastery check

Apply the rule before marking the lesson complete

Progress0/4 + 0/1
Q01

Which sentence is grammatically acceptable in the target system?

Q02

Which description best defines “reported speech”?

Q03

Which example is one of the verified target patterns in this lesson?

Q04

Which structural formula belongs to this lesson?

Complete all four checks, then submit a sentence for target-form feedback.

06 · IELTS Academic

Transfer grammar into a real communicative task

In Speaking, use reported speech to retell advice, conversations and opinions while preserving natural pronoun and time reference. In Writing Task 2, reporting verbs such as argue, suggest, acknowledge and warn let you distinguish your position from another source. Avoid presenting a weak suggestion as proof; verb choice is part of critical evaluation, not just vocabulary range.

E1

Backshift only when the reporting viewpoint and temporal relation justify it.

E2

Form reported wh-questions and yes/no questions without inversion or do-support.

E3

Use say, tell, ask and specialised reporting verbs with licensed complement patterns.

E4

Represent another source accurately without blurring authorship or certainty.