If you are preparing for the B2 First exam, Key Word Transformations can feel like one of the trickiest parts of the Reading and Use of English paper.

You may understand both sentences. You may even know the grammar. But then comes the difficult part:

How do you rewrite the sentence without changing the meaning?

That is exactly what Key Word Transformations test.

In this lesson, you will learn how the task works, which grammar patterns appear most often, what mistakes to avoid, and how to approach each question step by step.

What Are B2 First Key Word Transformations?

Key Word Transformations are Part 4 of the B2 First Reading and Use of English paper.

You are given:

• a first sentence
• a key word
• a second sentence with a gap

You must complete the second sentence so that it has a similar meaning to the first one.

You must use the key word exactly as it is given.

For example:

I haven’t seen Mark for three months.

SINCE

It has been three months since I last saw Mark.

The meaning stays the same, but the grammar changes.

There are 6 questions in this part of the exam, and each answer can receive up to 2 marks.

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Common B2 First Key Word Transformation Patterns

The good news is that the same grammar patterns appear again and again.

Once you learn to recognise them, the task becomes much easier.

1. Present Perfect

You may need to change a past simple sentence into the present perfect.

I moved to London in 2020.

LIVED

I have lived in London since 2020.

2. Too and Enough

These structures are very common in Part 4.

The box was so heavy that I couldn’t lift it.

TOO

The box was too heavy for me to lift.

You may also see transformations with enough.

He isn’t tall enough to reach the shelf.

SHORT

He is too short to reach the shelf.

3. So and Such

Learners often confuse so and such, which makes them perfect for transformation questions.

The film was so interesting that I watched it twice.

SUCH

It was such an interesting film that I watched it twice.

4. Passive Voice

You may need to change an active sentence into a passive one.

They built this bridge in 1998.

WAS

This bridge was built in 1998.

5. Reported Speech

Reported speech is another common area.

“Don’t touch that button,” the teacher said.

WARNED

The teacher warned us not to touch that button.

6. Modal Verbs

Modal verbs often test possibility, certainty, advice or criticism.

I’m sure she is at home.

MUST

She must be at home.

7. Conditionals

Conditionals appear very frequently in transformation exercises.

If you don’t hurry, you’ll miss the bus.

UNLESS

You’ll miss the bus unless you hurry.

8. Wish

Wish is commonly used to express regret.

I don’t know how to drive.

WISH

I wish I knew how to drive.

9. Comparatives and Superlatives

Comparison structures are another favourite.

This is the best book I have ever read.

BETTER

I have never read a better book.

10. Verb Patterns and Fixed Expressions

Sometimes the task tests vocabulary as much as grammar.

She said she was sorry that she arrived late.

APOLOGISED

She apologised for arriving late.

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Common Mistakes in Key Word Transformations

Students often lose marks because of small mistakes.

1. Changing the key word

Do not change its form.

2. Changing the meaning

Your second sentence must mean the same as the first.

3. Forgetting prepositions

For example:

❌ She apologised arriving late.

✅ She apologised for arriving late.

4. Using the wrong tense

❌ I wish I know the answer.

✅ I wish I knew the answer.

5. Ignoring the word limit

In B2 First Key Word Transformations, your answer must contain two to five words, including the key word.

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Key Word Transformations Practice

Download the Key Word Transformations for B2 First Practice Worksheet in PDF here

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Want More B2 First Use of English Practice?

If Key Word Transformations are one of the parts you find difficult, my B2 First Reading & Use of English Complete Collection gives you structured, exam-focused practice instead of random exercises.

Practise the language and patterns you need for B2 First Reading and Use of English, with plenty of exercises you can work through at your own pace.

Final Tips

B2 First Key Word Transformations are not about memorising hundreds of answers.

They are about recognising patterns.

The more you practise structures such as too/enough, wish, conditionals, passive voice, modal verbs, phrasal verbs and reporting verbs, the quicker you will recognise what each question is testing.

A useful habit is to keep a small notebook of transformations you find difficult. Write down the original sentence, the key word and the correct answer.

After a while, the patterns start to repeat — and Part 4 becomes much less intimidating.

Related posts:

• Present Perfect Simple 
• Passive Voice 
• Reported Speech
• Conditionals 
• Gerund and Infinitive 
• Phrasal Verbs Archives