Breakdown of Sei que a classe é imune a esse dano.
ser
to be
a
to / at (direction)
esse
that (esse, essa, esses, essas)
saber
to know
que
that (conjunction)
o dano
the damage (physical or moral harm)
a classe
the class (group of students)
imune
immune
Questions & Answers about Sei que a classe é imune a esse dano.
How does the adjective-preposition rule work with imune in this sentence?
This sentence highlights regência nominal (adjective + preposition regimes). The adjective imune always demands the preposition a to introduce the thing being resisted. Luckily, this perfectly matches the English "immune to", but you must memorize these pairings because they don't always translate so neatly!
Why is the indicative verb é used here instead of the subjunctive seja?
Because the sentence starts with Sei que (I know that). Verbs expressing certainty, facts, or strong beliefs take the indicative mood. If the statement expressed doubt, such as Duvido que a classe... (I doubt that the class...), then you would need the subjunctive seja.
Would I use classe to talk about a school classroom?
No. In Portuguese, a physical classroom is a sala de aula, the lesson itself is an aula, and the group of students is a turma. Here, classe means a category or type, such as a biological classification or a character class in a video game (which makes sense given the word dano, meaning damage).
Why use esse instead of aquele for "that" damage?
Esse is used for things near the listener, or for concepts that were just brought up in the conversation. If the damage was something physically distant or an event far in the past from both speakers, aquele would be used instead.
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