tests by hidalgo with the online test builder (899 tests)

521. Pretérito indefinido: irregular verbs (8404 candidates)
522. Plural (4223 candidates)
523. Tanto (8924 candidates)
524. From another tense to present tense (1803 candidates)
525. Gérondif ou participe passé (10227 candidates)
526. #el que#lo que (4904 candidates)
527. Diminutive words (4370 candidates)
528. Simple past - irregular verbs (71494 candidates)
529. Personal pronouns (1330 candidates)
530. Muy/Mucho (29566 candidates)
531. Pretérito indefinido / Conditional present (5323 candidates)
532. Synonyms (verbs) (12490 candidates)
533. Esta - está - ésta (20468 candidates)
534. Enclisis (9955 candidates)
535. Present - Irregular verbs (2643 candidates)
536. Present - Regular verbs (8696 candidates)
537. Possessive adjectives (11753 candidates)
538. Imperative no (40000 candidates)
539. Possessive adjectives (19002 candidates)
540. Missing words (1300 candidates)