La quinta lezione è molto difficile.

Breakdown of La quinta lezione è molto difficile.

essere
to be
molto
very
difficile
difficult
la lezione
the lesson
quinto
fifth

Questions & Answers about La quinta lezione è molto difficile.

Why is it quinta instead of quinto?
Ordinal numbers like quinto (fifth) act like adjectives in Italian, meaning they must change their ending to match the noun they describe. Because lezione is a feminine singular noun, the ending changes to -a, making it quinta.
Lezione ends in -e, so how do we know it is a feminine noun?
While nouns ending in -e can be either masculine or feminine, words that end in -zione are almost always feminine in Italian. Because it is feminine, it requires the feminine article la and the feminine ordinal quinta.
Should molto change to molta to match the feminine noun?
Not in this sentence. When molto means 'very' and describes an adjective (like difficile), it acts as an adverb and its ending never changes. It only changes its ending when it means 'a lot of' and is attached directly to a noun (like molta pasta).
Why doesn't the adjective difficile end in -a to match the feminine noun lezione?
Adjectives in Italian generally fall into two groups: those that end in -o or -a in the singular, and those that naturally end in -e. Difficile belongs to the second group, meaning it keeps the exact same -e ending for both masculine and feminine singular nouns.

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