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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
GS1.02CEFR A2Word classes and phrase building

Pronouns and reference

Pronouns replace or point back to noun phrases. The form changes according to grammatical function and the reference must remain unambiguous.

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

pronoun/ˈprəʊnaʊn/

đại từ

A word used instead of a noun phrase or to refer to participants in discourse.

she, them, it, themselves

cô ấy, họ, nó, chính họ

T02

antecedent/ˌæntɪˈsiːdənt/

tiền ngữ

The noun phrase to which a pronoun refers.

The model was revised because it was unstable.

Mô hình được sửa vì nó không ổn định.

T03

reference/ˈrefrəns/

tham chiếu

The relationship between a linguistic form and the entity it identifies.

These findings support the hypothesis.

Những phát hiện này ủng hộ giả thuyết.

T04

case/keɪs/

cách đại từ

The form chosen for a pronoun according to subject, object or possessive function.

I checked it; they sent it to me.

Tôi kiểm tra nó; họ gửi nó cho tôi.

T05

reflexive pronoun/rɪˈfleksɪv ˈprəʊnaʊn/

đại từ phản thân

A pronoun ending in -self/-selves used when an object refers back to the clause subject or for emphasis.

She calibrated it herself.

Cô ấy tự hiệu chỉnh nó.

T06

summary noun/ˈsʌməri naʊn/

danh từ khái quát

A noun after this/these that names the discourse role of a previous idea and makes reference clearer.

This limitation reduces transferability.

Hạn chế này làm giảm khả năng chuyển giao.

Complete lesson scope

Do not stop at one formula

4 coverage areas
1

Subject, object, possessive and reflexive forms

2

Personal, demonstrative, indefinite and reciprocal pronouns

3

Antecedent agreement and avoidance of ambiguous reference

4

Dummy it, existential there and generic reference

Decision boundary: A pronoun is acceptable only when its grammatical case and intended antecedent are both recoverable.

02 · Controlling rule

Choose subject, object, possessive or reflexive form by function. Then verify number, person and semantic agreement with one clear antecedent; when a whole idea is referenced, a demonstrative plus a summary noun is often clearer than a bare pronoun.

Structural formulaantecedent → case-appropriate pronoun | this/these + summary noun
GS1 · Deep reference

Pronouns and reference chains

Select pronoun case and type by grammatical function, maintain agreement with the antecedent and create reference chains that a reader can recover without guessing.

Knowledge modules4
Module 01

1. Personal pronouns and grammatical case

English marks subject and object function in pronoun form even though most nouns do not change. Position is a clue, but grammatical function is the real test.

Structuresubject form + finite verb | verb/preposition + object form
1

Use I/he/she/we/they as subjects and me/him/her/us/them as objects.

2

In coordination, test the pronoun alone: Kim and I analysed it → I analysed it; between you and me → between me.

3

Formal comparison may preserve an understood verb: She is more experienced than I am; everyday English also allows than me.

Worked example 1

The technicians sent us the revised calibration file.

Us is the indirect object of sent, so the object form is required.
Worked example 2

My colleague and I independently checked the boundary conditions.

The coordinated phrase is the subject; removing my colleague leaves I checked, not me checked.

Core pronoun paradigm

Choose the column by function, not by politeness or sentence position alone.

PersonSubjectObjectPossessive determinerPossessive pronounReflexive
1st singularImemyminemyself
2ndyouyouyouryoursyourself/yourselves
3rd singularhe/she/ithim/her/ithis/her/itshis/hers/—himself/herself/itself
Pluralwe/theyus/themour/theirours/theirsourselves/themselves

Reference choice by discourse job

Clarity may require a fuller expression than the shortest pronoun.

Discourse jobUseful formExample
Continue same entityhe/she/it/theyThe model failed because it diverged.
Point to nearby textthis/these + summary nounThis limitation affects transferability.
Contrast two itemsthe former/the latterobservations and simulations; the latter...
Introduce existencethere + be/seem/appearThere are two explanations.
Error laboratory

High-risk contrasts

Me and Lan checked the files.
Lan and I checked the files.

The coordinated phrase is the subject, so use I. Conventional ordering also normally places the other person first.

This dataset is our.
This dataset is ours.

Our must modify a following noun; ours replaces the complete noun phrase.

Please contact myself if you have questions.
Please contact me if you have questions.

The object does not refer back to the imperative subject you, so use me, not myself.

The report compared the model with the dataset, but it was incomplete.
The report compared the model with the dataset, but the dataset was incomplete.

It could refer to the report, model or dataset; repeat the intended noun.

Guided practice

Concept and form check

Progress0/4
1. Choose the correct coordinated subject.
2. Which form completes “Their results differ from ___”?
3. Which revision removes ambiguity?
4. In “It is likely that the storm will intensify”, what is it?
IELTS transfer

Apply the system in context

Write a three-sentence IELTS paragraph: introduce two causes, refer back to each unambiguously, then summarize the combined effect with this + a summary noun.

  • Every pronoun has one recoverable antecedent.
  • Case matches subject, object or possessive function.
  • Use a summary noun when a whole idea is referenced.

03 · Worked examples

Observe form, function and meaning together

EX01

My colleague and I independently checked the boundary conditions.

Đồng nghiệp của tôi và tôi đã kiểm tra độc lập các điều kiện biên.

Choose subject, object, possessive or reflexive form by function. Then verify number, person and semantic agreement with one clear antecedent; when a whole idea is referenced, a demonstrative plus a summary noun is often clearer than a bare pronoun.
EX02

Our estimates were lower than theirs.

Các ước tính của chúng tôi thấp hơn các ước tính của họ.

Choose subject, object, possessive or reflexive form by function. Then verify number, person and semantic agreement with one clear antecedent; when a whole idea is referenced, a demonstrative plus a summary noun is often clearer than a bare pronoun.
EX03

The mesh was refined. This modification reduced the numerical error.

Lưới được làm mịn. Sự điều chỉnh này làm giảm sai số số trị.

Choose subject, object, possessive or reflexive form by function. Then verify number, person and semantic agreement with one clear antecedent; when a whole idea is referenced, a demonstrative plus a summary noun is often clearer than a bare pronoun.
EX04

There appears to be a systematic bias in the sensor record.

Có vẻ tồn tại một độ chệch có hệ thống trong chuỗi ghi cảm biến.

Choose subject, object, possessive or reflexive form by function. Then verify number, person and semantic agreement with one clear antecedent; when a whole idea is referenced, a demonstrative plus a summary noun is often clearer than a bare pronoun.

04 · High-risk contrast

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

Incorrect

The report compared the model with the dataset, but it was incomplete.

Repaired

The report compared the model with the dataset, but the dataset was incomplete.

It has three plausible antecedents. Repeating the intended noun removes ambiguity and improves cohesion.

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 “pronoun”?

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

Use explicit reference chains across sentences: introduce a cause, refer back with it/they, and summarise a previous claim with this trend, this limitation or these findings.

E1

Select subject and object case correctly, including coordination.

E2

Distinguish possessive determiners from possessive pronouns.

E3

Recognise dummy it, existential there and generic reference.

E4

Repair an ambiguous reference chain.