tests by here4u with the online test builder (685 tests)

521. Choosing your past tense... (49133 candidates)
522. Tenses : satisfying the request... (2) (2298 candidates)
523. The use of tenses: a strange request...(1) (3647 candidates)
524. Either...or/ Neither...nor/ Not ... either. (13650 candidates)
525. There is / are, and other forms... (5155 candidates)
526. To be / to have: -ing forms... (4353 candidates)
527. Enough with the Present Perfect... (22338 candidates)
528. Whose and use (5573 candidates)
529. Else and compound words (3785 candidates)
530. What, which and all that (7132 candidates)
531. Possessive idioms (3147 candidates)
532. Possessive or genitive Case (27853 candidates)
533. Possessive adjectives and pronouns. (26078 candidates)
534. Adjectives: where to place them? (17773 candidates)
535. Adverbs: Where to place them? 2 (5133 candidates)
536. Adverbs: Where to place them? 1 (12185 candidates)
537. For/Since: second step... (4147 candidates)
538. For/Since: first step ... (7349 candidates)
539. Make someone do/ Be made to do (10838 candidates)
540. Like/to like/likely... (5018 candidates)