Question

According to this lesson, the verb must agree with the subject in __________. case number gender tense

Answer 1

The correct answer is 'number'. Because verbs don't have cases - nouns do. Also, verbs don't have genders - but nouns do. Then, nouns don't have tenses - but verbs do. The only thing they have in common is 'number'. 

Answer 2

number is the answer