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Questions & Answers about O sol é forte.
Why does this sentence use é instead of está for "is"?
In Portuguese, there are two verbs for "to be": ser (for permanent or inherent traits) and estar (for temporary states). By using é (from ser), this sentence states a general fact about the sun's nature. If you wanted to say the sun feels particularly strong right now or today, you would use está: O sol está forte.
If the noun was feminine, would forte change to match it?
No, it would stay exactly the same! While many Portuguese adjectives change their ending to match masculine (-o) or feminine (-a) nouns, adjectives that end in -e are generally gender-neutral. Forte works for both masculine nouns like o sol and feminine nouns like a chuva (the rain).
Why isn't sol capitalized here?
In everyday Portuguese, celestial bodies like sol (sun), lua (moon), and terra (earth) are written in lowercase. You will usually only see them capitalized in strict astronomical or scientific contexts.