tests by paka98 with the online test builder (12 tests)
Ranked by: number of candidates
1. Agreement of subject and verb (31864 candidates)
2. Active and Passive Voice (26750 candidates)
3. Conditional (23570 candidates)
4. Formation of adjectives (10130 candidates)
5. Gerunds (9924 candidates)
6. Opposites by adding prefixes (5980 candidates)
7. Formation of verbs (5069 candidates)
8. Formation of nouns (4019 candidates)
9. Weather and the Environment (3184 candidates)
10. Comparative and superlative (3127 candidates)
11. Irregular plurals (2223 candidates)
12. Question Tags (1625 candidates)