Question 1

How do I change a comparative sentence to as...as?

Accepted Answer

Follow three steps. First, swap the two subjects — the second item becomes the new subject. Second, change the comparative adjective back to its base form: "taller" → "tall," "more expensive" → "expensive." Third, add "isn't as...as" (or "aren't as...as" for plural subjects). Example: "London is bigger than Manchester" → "Manchester isn't as big as London." The meaning stays exactly the same — Manchester is smaller in both sentences. For Cambridge Key Word Transformations, always check that both sentences express the same idea. This technique also works with adverbs: "She runs faster than me" → "I don't run as fast as her."

Question 2

Does not as...as mean the same as a comparative with than?

Accepted Answer

Yes — "not as...as" and a comparative with "than" express the same idea, but from opposite directions. "My flat isn't as big as yours" means the same as "Your flat is bigger than mine." The first sentence uses the subject with the smaller quality; the second uses the subject with the larger quality. Both are equally correct and natural. In examinations, you may need to transform one into the other, so you must understand this relationship. The only difference is emphasis: "not as...as" gently states a fact, while a comparative with "than" makes the difference sound slightly more direct.

Question 3

When is as...as transformation tested in English exams?

Accepted Answer

Sentence transformation with "as...as" appears in several Cambridge examination formats. In B1 Preliminary (PET), the Writing section sometimes requires rephrasing. In B2 First (FCE), Part 4 Key Word Transformations frequently tests this skill — you might see: "Complete the second sentence so it means the same: 'London is more expensive than Paris. Paris isn't ______ London.'" The answer would be "as expensive as." IELTS does not have a direct transformation task, but using both forms in your writing demonstrates range. Practising these transformations helps you become more flexible with comparative structures overall.

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