Chapter 6 · English Grammar

Cohesion & Coherence

Advanced ⏱ 40–50 minutes 🎓 Grade 11

What you will be able to do

  • Distinguish cohesion (the links) from coherence (the logic)
  • Use reference, substitution, ellipsis and conjunction to link ideas
  • Use lexical cohesion (repetition, synonyms, collocation)
  • Write a clear topic sentence with supporting details
  • Sequence ideas logically for coherence
Builds on / Related chapters
Grade 9 · Connectors & Discourse Markers

1 Quick Introduction

English

Good writing doesn't just have correct sentences — it holds together. Cohesion is the set of grammatical and lexical links that tie sentences (pronouns, connectors, repeated key words). Coherence is the deeper logic — ideas in a sensible order, each building on the last. Cohesion is the stitching; coherence is the shape of the garment.

हिन्दी

अच्छे लेखन में केवल सही वाक्य नहीं होते — वह आपस में जुड़ा रहता है। Cohesion उन व्याकरणिक व शाब्दिक कड़ियों का समूह है जो वाक्यों को बाँधती हैं (सर्वनाम, संयोजक, दोहराए मुख्य शब्द)। Coherence गहरा तर्क है — विचार समझदार क्रम में, हर एक पिछले पर आधारित। Cohesion सिलाई है; coherence वस्त्र का आकार।

2 A Real-Life Situation

Imagine this

Two versions of a short note:

Disjointed: Trees are important. People cut forests. Air is polluted. We should plant.

Cohesive: Trees are important because they clean the air. However, people keep cutting forests, so pollution rises. Therefore, we should plant more.

Why this form? The second version adds links ('because', 'However', 'so', 'Therefore') and keeps the topic (trees/air) running through it. The ideas now flow logically — that combination of cohesion and coherence is what makes writing read well.

3 The Grammar Rule

Rule & Formula
Cohesion deviceExample
ReferenceRavi… he, his, this
Substitutionthe red car / the blue one
EllipsisShe can, and he can too.
Conjunctionhowever, therefore, also
Lexicalforest… trees… woodland
Cohesion = the links between sentences · Coherence = the logical order of ideas
Pollution is rising. This (reference) worries scientists, who (reference) urge action.

4 Cohesion — The Links Between Sentences

Cohesion uses five main devices to connect sentences:

  • Reference: pronouns and demonstratives point back to a noun — Riya won. She was thrilled. This surprised no one.
  • Substitution: a pro-form replaces a phrase — I need a pen. Do you have one?
  • Ellipsis: repeated words are omitted — She passed; he didn't (pass).
  • Conjunction: connectors show the relation — however, therefore, moreover, in addition.
  • Lexical cohesion: repetition, synonyms and collocation keep a theme alive — the forest … the woods … these trees.

These links are what stop a paragraph from feeling like a list of unrelated sentences.

Visual — Cohesion — The Links Between Sentences
Cohesion ties sentences togetherreferencesubstitutionellipsisconjunctionlexical
1
Worked Example
Which cohesion device links these? The minister spoke. He sounded confident.
Solution

Reference — 'He' refers back to 'The minister'.

2
Worked Example
Identify the device: Some students passed; others did not.
Solution

Ellipsis/substitution — 'did not (pass)' omits the repeated verb.

Key Points

  • Cohesion devices: reference, substitution, ellipsis, conjunction, lexical
  • Reference (he/this) and conjunctions (however/therefore) are the most common
  • Lexical cohesion keeps a theme alive with synonyms and repetition

5 Coherence — The Logic of Ideas

Coherence is about the order and logic of ideas, not just surface links. A coherent paragraph has:

  • A clear topic sentence that states the main idea.
  • Supporting details that develop that idea, each relevant.
  • A logical sequence — chronological, cause-effect, general-to-specific, or order of importance.
  • Smooth transitions between points (first, then, as a result, finally).

A paragraph can be cohesive (full of connectors) yet incoherent if the ideas don't actually follow. Coherence asks: does each sentence belong here, and in this order?

To improve coherence: start with the topic sentence, group related ideas, cut anything off-topic, and order the points so the reader is never lost.

1
Worked Example
Which is the topic sentence?
(a) For example, sleep improves memory.
(b) Good sleep is essential for health.
Solution

(b) — it states the main idea; (a) is a supporting detail.

2
Worked Example
Order for coherence: (1) As a result, the plants died. (2) The gardener forgot to water them. (3) The summer was unusually hot.
Solution

3 → 2 → 1 — context, cause, then result.

Key Points

  • Coherence = logical order of ideas, not just surface links
  • Topic sentence + relevant supporting details + logical sequence
  • Use transitions; cut off-topic sentences; order points clearly

6 Vocabulary Builder

WordMeaningहिन्दी
Cohesiongrammatical/lexical linksसुसंबद्धता
Coherencelogical connection of ideasतर्कसंगति
Referencepointing back with a pronounसंदर्भ
Topic sentencethe main-idea sentenceविषय-वाक्य
Transitiona linking moveसंक्रमण
✎ Vocabulary Quick Test0 / 1
Q.Coherence is mainly about:
Explanation: Coherence concerns how logically the ideas are connected and ordered.

7 Common Mistakes to Avoid

✗ IncorrectA paragraph with connectors but no logical order.
✓ CorrectOrder the ideas logically AND link them.
Cohesion without coherence still confuses the reader.
✗ IncorrectStarting a paragraph with an example, not a topic sentence.
✓ CorrectBegin with a clear topic sentence.
The main idea should lead.
✗ IncorrectUsing 'it'/'this' with no clear noun to refer to.
✓ CorrectMake every pronoun's reference clear.
Vague reference breaks cohesion.
✗ IncorrectRepeating the same word too often instead of using synonyms.
✓ CorrectVary with synonyms (forest/woods).
Lexical cohesion needs variety, not monotony.

8 Practice Exercises

Fill in the BlanksLevel 1
Name the cohesion device used.
  1. Ravi is tall. He plays basketball. (He = Ravi)
  2. I lost my pen. Can I borrow one?
  3. She likes tea; he doesn't.
  4. It rained heavily; therefore, we stayed in.
  5. The forest was vast. These woods had ancient trees.
Answer Key
  1. reference
  2. substitution
  3. ellipsis
  4. conjunction
  5. lexical cohesion
Fill in the BlanksLevel 2
Choose the best connector for coherence.
  1. Exercise is healthy. ______ , many people avoid it.
  2. He saved for years. ______ , he bought a house.
  3. Trees clean the air. ______ , they provide shade.
  4. It was raining. ______ , the match was cancelled.
  5. First, plan your essay. ______ , write a draft.
Answer Key
  1. However
  2. Eventually / Finally
  3. Moreover / In addition
  4. Therefore / As a result
  5. Then / Next
Error Detection
  1. The dog barked. It was angry. It scared. It ran.
  2. However, sleep is important. (paragraph opener)
  3. He studied. He played. He slept. He ate. He worked.
  4. This is true. (no clear antecedent)
Answer Key
  1. The dog barked angrily. It scared the children and then ran off. (error: vague/choppy reference)
  2. Sleep is important. However, many people ignore it. (error: However as opener)
  3. He studied in the morning, then played, and after a meal he worked late. (error: no cohesion)
  4. This claim is true. (error: vague 'This')
Sentence Correction
  1. Because of this. It happened.
  2. The plan failed therefore we tried again moreover we learned.
  3. Reading is good. Cricket is fun. Maths is hard. (no link)
Answer Key
  1. Because of this, it happened.
  2. The plan failed; therefore, we tried again. Moreover, we learned from it.
  3. Reading is good for the mind, just as exercise like cricket is good for the body.
Rearrange the Words
  1. (1) As a result, prices rose. (2) Demand increased sharply. (3) Supplies ran low.
  2. (1) She practised daily. (2) Riya wanted to win. (3) Finally, she succeeded.
  3. (1) However, it was too late. (2) We rushed to the station. (3) The train had left.
Answer Key
  1. 2 → 3 → 1
  2. 2 → 1 → 3
  3. 2 → 3 → 1
Match the Following
Column AColumn B
1. he / thisa. conjunction
2. one / onesb. reference
3. She can; he can't.c. ellipsis
4. however / therefored. substitution
Answer Key
he / this → referenceone / ones → substitutionShe can; he can't. → ellipsishowever / therefore → conjunction

9 Micro Quiz

✎ Quick Check — 5 questions0 / 5
Q1.Cohesion is mainly about:
Explanation: Cohesion = the grammatical/lexical links.
Q2.'He' referring back to 'the boy' is which device?
Explanation: Pronoun reference.
Q3.Which sentence is a topic sentence?
Explanation: It states the main idea.
Q4.Best connector: 'It was costly; ___ , it was worth it.'
Explanation: Contrast → 'however'.
Q5.A paragraph full of connectors but with no logical order lacks:
Explanation: It lacks coherence (logical order).

10 Reading Practice

Plastic pollution is a growing crisis. It harms oceans, kills marine life, and enters our food. However, the problem is not hopeless. Many cities have banned single-use bags; others are encouraging recycling. Moreover, new materials are being developed. Therefore, with awareness and effort, this damage can still be reversed. In short, the solution lies in our own hands.

Comprehension Questions
  1. Identify the topic sentence.
  2. Find two conjunctions used for cohesion and the relation each shows.
  3. Give one example of lexical cohesion in the passage.
Answer Key
  1. 'Plastic pollution is a growing crisis.' — it states the main idea.
  2. 'However' (contrast), 'Moreover' (addition), 'Therefore' (result), 'In short' (summary).
  3. 'pollution … the problem … this damage … the solution' keep the theme connected.

11 Speaking, Writing & Daily Use

Say these aloud
  • Trees clean the air; moreover, they give shade.
  • She studied hard; therefore, she passed.
  • It rained; however, we still went out.
  • First we planned, then we acted.
  • In short, hard work pays off.
Write a short coherent paragraph (5 sentences) on any topic, beginning with a clear topic sentence, then supporting details linked with at least three cohesion devices.
Example: Reading is a powerful habit. It widens our knowledge and sharpens the mind. Moreover, it improves our language. However, fewer people read today. Therefore, we must revive this habit.

12 Challenge Zone

🔥 Higher-Level Questions — 30 / 3
Q1.Which improves coherence the most?
Explanation: Coherence comes from a clear main idea and logical order.
Q2.Identify the weak link: 'The economy grew. It. This was good. Therefore.'
Explanation: 'It.' and 'Therefore.' are fragments; 'This' is vague.
Q3.Choose the most coherent ordering: (1) So she apologised. (2) Maya forgot her friend's birthday. (3) Her friend felt hurt.
Explanation: Cause → effect → response.

13 Chapter Mind Map

Mind Map
    COHESION & COHERENCE
                |
   +------------+------------+
   |                         |
 COHESION                COHERENCE
 (the links)             (the logic)
 reference/he            topic sentence
 substitution/one        supporting detail
 ellipsis                logical sequence
 conjunction/however     transitions
 lexical (synonyms)      relevance

14 One-Minute Revision

Remember these

  • Cohesion = the links between sentences; coherence = the logical order of ideas
  • Cohesion devices: reference, substitution, ellipsis, conjunction, lexical
  • A coherent paragraph has a topic sentence + relevant details + logical sequence
  • Use transitions; keep every pronoun's reference clear
  • Cohesion without coherence still confuses — order the ideas too