Question 1

Why is there a lo before sei?

Accepted Answer

Here, lo is a pro-predicative pronoun. It replaces the adjective altruista from the first half of the sentence to avoid repetition. While in English we simply say "you are too" and leave a blank space, Italian requires lo to represent that dropped adjective. You can think of it as meaning "you are it too."

Question 2

Would lo change to la if the sentence were about my grandmother?

Accepted Answer

No. When the pro-predicative lo replaces an adjective or an indefinite noun, it is completely invariable. Even if the sentence were Mia nonna è altruista, you would still say e lo sei anche tu.

Question 3

Since nonno is masculine, why does altruista end in -a?

Accepted Answer

Adjectives ending in -ista (like altruista, ottimista, pessimista) have the same form for both masculine and feminine in the singular. They do change in the plural, however, becoming -isti for masculine and -iste for feminine.

Question 4

Why do we say mio nonno instead of il mio nonno?

Accepted Answer

This is a quick reminder of the family rule: Italian drops the definite article (il, la, etc.) before possessives when referring to singular, unmodified close family members. If it were plural, you would need the article: i miei nonni.

Question 5

Why is the subject pronoun tu included at the end? Doesn't sei already mean "you are"?

Accepted Answer

While Italian usually drops subject pronouns, words like anche (also/too) need to sit directly next to the specific word they modify. To say "you too," Italian explicitly uses anche tu to emphasize exactly who else is altruistic.

Mio nonno è altruista, e lo sei anche tu.

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