Mixing up adjectives and adverbs is one of the most common grammar errors in IELTS and TOEFL writing.
Adjectives modify nouns (a clear explanation); adverbs modify verbs, adjectives, or other adverbs (she explained it clearly). Confusing the two — writing she explained it clear or a clearly explanation — is a Grammatical Range & Accuracy error that pulls your IELTS band score down.
In Cambridge Use of English (Part 3 — word formation), you’re frequently asked to convert between word classes. Recognizing which suffix turns an adjective into an adverb (and vice versa) is a testable, learnable skill — and this exercise drills exactly that.
1. He speaks French . (good)✓
2. She buys all of her favorite singer's albums . (faithful)✓
3. The Japanese students at the hostel spoke pretty English. (good)✓
4. I haven't seen him as of . (late)✓
5. She is quite reliable. (normal)✓
6. This is my breakfast. (usual)✓
7. I told the taxi driver to drive more . (careful)✓
8. The world would be a better place if people were more . (compassionate)✓
9. She was running to catch the bus. (fast)✓
10. I wish they'd speak more . (quiet)✓
11. He perfomed his job in such a manner that his coworkers reported him to the boss. (careless)✓
12. My ex-girlfriend said that she called me by accident, but I knew that she did it . (deliberate)✓
13. He wandered around . (aimless)✓
14. I found his story pretty . (humorous)✓
15. The journalist reported the story in a . way. (fair)✓