Final answer:
The adjective 'intéressant' in French must agree with the noun it modifies in gender and number: 'intéressant' for masculine singular nouns, and 'intéressante' for feminine singular nouns.
Step-by-step explanation:
The correct form of the word intéressant in French depends on the gender and number of the noun it is modifying. In French, adjectives must agree in gender and number with the nouns they describe.
- If the noun is masculine and singular, the correct form is intéressant.
- If the noun is feminine and singular, the form should be intéressante.
For example, 'un livre intéressant' means 'an interesting book' (where 'livre' is masculine). In contrast, 'une histoire intéressante' means 'an interesting story' (where 'histoire' is feminine).
Make sure the adjective agrees with the noun in both gender and number when you use it in a sentence, and spell it correctly to convey your idea accurately.