Why Key Word Transformation Is Hard
Cambridge Key Word Transformation (Part 4 in Use of English) is consistently the lowest-scoring section across FCE, CAE, and CPE exams. Why? Because it tests two skills simultaneously: vocabulary knowledge AND grammatical flexibility.
Students must rewrite a sentence using a given key word, changing the structure while keeping the meaning. The key word cannot be changed in any way — no tense changes, no plurals, no prefixes.
This requires deep understanding of paraphrasing, passive voice transformations, reported speech, and idiomatic expressions.
The Format Explained
Each item has three parts:
1. A lead-in sentence (the meaning you must preserve)
2. A key word (you must use this word exactly as given)
3. A gapped sentence (fill in 2-5 words including the key word)
2. A key word (you must use this word exactly as given)
3. A gapped sentence (fill in 2-5 words including the key word)
Example:
I haven't seen such a shoddy hotel before.
KEY WORD: worst
It is _____________ I have ever stayed in.
I haven't seen such a shoddy hotel before.
KEY WORD: worst
It is _____________ I have ever stayed in.
Answer: "the worst hotel" → It is the worst hotel I have ever stayed in.
The answer must use the key word unchanged, contain 2-5 words total, and preserve the original meaning.
5 Transformation Patterns to Master
Pattern 1: Active → Passive (and vice versa)
"They cancelled the meeting." → BEEN → "The meeting had been cancelled."
"They cancelled the meeting." → BEEN → "The meeting had been cancelled."
Pattern 2: Direct → Reported Speech
"I'll help you tomorrow," she said. → PROMISED → She promised to help me the next day.
"I'll help you tomorrow," she said. → PROMISED → She promised to help me the next day.
Pattern 3: Conditional Restructuring
"If you don't hurry, we'll be late." → UNLESS → "Unless you hurry, we'll be late."
"If you don't hurry, we'll be late." → UNLESS → "Unless you hurry, we'll be late."
Pattern 4: Comparison Reframing
"This hotel is worse than the last one." → AS → "The last hotel was not as bad as this one."
"This hotel is worse than the last one." → AS → "The last hotel was not as bad as this one."
Pattern 5: Phrasal Verb ↔ Formal Equivalent
"The meeting was postponed." → PUT → "The meeting was put off."
"The meeting was postponed." → PUT → "The meeting was put off."
lightbulb
Teacher Tip
"Practice 3 key word transformations daily for 4 weeks before the exam. Not 20 in one sitting — just 3, every single day. Distributed practice beats massed practice for this type of skill. DrillKit can generate Cambridge Part 4 exercises from any vocabulary set."
Frequently Asked Questions
Can the key word be changed at all?
add
No, never. The key word must appear in your answer exactly as given — same form, same tense, no plurals, no prefixes. If the key word is 'TAKE' you cannot write 'taken' or 'takes.'
How many words can the answer contain?
add
Between 2 and 5 words, one of which must be the key word. Contractions count as two words (don't = do not).
Can DrillKit generate Cambridge Part 4 exercises?
add
Yes! Select 'Key Word Transformation' as an exercise type. DrillKit generates items with the correct three-part format: lead-in sentence, key word, and gapped target sentence.