Ela chegou ontem . She arrived yesterday . These adverbs also come from adjectives as in English. Adjectives used as adverbs There are also some adjectives in Portuguese which can be used as adverbs. Speak louder .
Adjectives used as adverbs are invariable.
If an adverb has more than one word it is called adverbial phrase. A adverbial phrase normally begins with a preposition and it is like an expression you have to memorize.