tests by hidalgo with the online test builder (705 tests)

501. Imperative: affirmation & negation (6110 candidates)
502. Ser/Estar (5692 candidates)
503. Prepositions (1517 candidates)
504. Preterite tense (Pretérito indefinido) (11324 candidates)
505. Expressions with TENER (1031 candidates)
506. Conjunctions Y(E), O (U) (4437 candidates)
507. Prepositions (2046 candidates)
508. Clothes (1825 candidates)
509. Por qué, por que, porque, porqué (1657 candidates)
510. Infinitive or "que + subjunctive" in a subordinate (2980 candidates)
511. Prepositions (1433 candidates)
512. Personal pronouns (869 candidates)
513. Gender of nouns (928 candidates)
514. Antonyms (1509 candidates)
515. Present => Past and vice versa (1045 candidates)
516. Imperative mood (affirmative and negative commands) (1029 candidates)
517. Infinitives (791 candidates)
518. Subjunctive imperfect (857 candidates)
519. Preterite tense (Regular verbs) (16310 candidates)
520. Synonyms (verbs) (718 candidates)