Fill in the blank with 'mora' or 'može' based on the context.
Vani je mrak i hladno. On ___ biti unutra. (90% certainty)
✓ Correct!
✗ Not quite. Correct answer: mora
High certainty requires 'mora'.
frontend.learn_grammar.from_rule: Using Modal Verbs for Probability (Mora biti, Može biti)
Fill in the missing suffix (-iva-, -ava-, or -va-).
On mi stalno obeć___ti pomoć.
✓ Correct!
✗ Not quite. Correct answer: ava
The verb is 'obećavati'.
frontend.learn_grammar.from_rule: Aspectual Derivation through Suffixes
Choose the correct aspect for the background action.
Dok je sunce ____, mi smo šetali parkom.
✓ Correct!
✗ Not quite. Correct answer: sjalo
The sun shining is a background state, so we use the imperfective 'sjalo'.
frontend.learn_grammar.from_rule: Complex Aspectual Usage in Narrative
Correct the aspect error in the sentence.
Find and fix the mistake:
Svaki dan sam napisao dnevnik.
✓ Correct!
✗ Not quite. Correct answer: Svaki dan sam pisao dnevnik.
Habitual actions ('svaki dan') require the imperfective aspect.
frontend.learn_grammar.from_rule: Complex Aspectual Usage in Narrative
Fill in the blank with the emphatic form of 'him'.
Tražim ___, a ne Marka.
✓ Correct!
✗ Not quite. Correct answer: njega
Contrast requires the full form 'njega'.
frontend.learn_grammar.from_rule: Full Form Pronouns for Emphasis
Which question is grammatically correct?
Asking if someone has the book.
✓ Correct!
✗ Not quite. Correct answer: Imaš li ju?
'li' must follow the verb, and the pronoun 'ju' follows 'li'.
frontend.learn_grammar.from_rule: Clitic Placement in Questions and Negation
Complete the sentence with the correct perfective verb.
Kad ___ (pročitati) knjigu, posudit ću ti je.
✓ Correct!
✗ Not quite. Correct answer: pročitam
In 'kad' clauses referring to the future, we use the present of the perfective verb.
frontend.learn_grammar.from_rule: Aspectual Derivation through Prefixes (e.g., do-, na-, iz-)
Fill in the blanks with 'mi' and 'je' in the correct order.
On ___ ___ dao knjigu.
✓ Correct!
✗ Not quite. Correct answer: mi je
Dative 'mi' comes before auxiliary 'je'.
frontend.learn_grammar.from_rule: Common Errors in Clitic Placement
Correct the mistake in the sentence.
Find and fix the mistake:
Nemoj dati mi to.
✓ Correct!
✗ Not quite. Correct answer: a
In negative imperatives, the clitic must follow 'nemoj'.
frontend.learn_grammar.from_rule: Clitic Placement with Imperative and Infinitives
Correct the mistake: 'Ako barem sutra ne pada kiša!'
Find and fix the mistake:
Ako barem sutra ne pada kiša!
✓ Correct!
✗ Not quite. Correct answer: Da barem sutra ne pada kiša!
We use 'da', not 'ako', for hypothetical wishes.
frontend.learn_grammar.from_rule: Expressing Wishes and Regrets with Conditionals