FCE Key Word Transformation: 5 Essential Rules for Part 4
Master Cambridge B2 First Use of English Part 4. Learn the 5 most frequent grammar structures, common pitfalls, and practice with real exam examples.

Part 4 of the B2 First (FCE) Use of English paper is notoriously challenging. It tests not only your vocabulary and grammar knowledge but also your precision.
To pass this section with high marks, you need to understand the exact patterns Cambridge examiners use every year.
The 5 Most Frequent Grammar Patterns in Part 4
1. Comparative to Superlative (and vice versa)
Examiners love testing comparative structures using words like as, than, enough, or too.
- Original Sentence: I have never seen such a beautiful painting.
- Key Word: MOST
- Target Answer: It is
the most beautiful painting I haveever seen.
Pro Tip: Watch out for the word limit! You must use between 2 and 5 words, including the key word given. Contractions (like don't) count as two words.
2. Reported Speech & Verb Changes
When converting direct speech to reported speech, remember that tenses usually shift backward and time expressions change.
- Original Sentence: "I didn't break the window," said Jack.
- Key Word: DENIED
- Target Answer: Jack
denied breaking thewindow.
3. Passive Voice Transformations
If the original sentence is active, expect to rewrite it in the passive voice—often combining it with a modal verb.
- Original Sentence: They are going to repair my car tomorrow.
- Key Word: HAVING
- Target Answer: I am
having my car repairedtomorrow.
3 Fatal Mistakes to Avoid
- Changing the Key Word: Never change the form of the given word. If the key word is WISH, do not write wishing or wished.
- Exceeding the Word Count: Writing 6 words results in an automatic 0 points, even if the grammar is correct.
- Spelling Errors: Words spelled incorrectly will lose you marks. Always double-check your answers.
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