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Portuguese (Brazil) · Pronunciation Guide
How do you pronounce "do" in Portuguese (Brazil)?
DOO, rhyming with English "do." The d stays hard here — no "dj" — because the vowel is an o, not an i.
An unstressed contraction that leans on the noun after it. It sits in a four-way set — do, da, dos, das — and none of them takes an accent because none of them is stressed. Portuguese contracts "de" with every article obligatorily, so writing "de o" is simply ungrammatical rather than merely formal.
Listen: do
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Hear it in a sentence
A cor do céu é azul.
The color of the sky is blue.
Listen: A cor do céu é azul.
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"A cor do céu é azul" uses the contraction to express possession where English would say "of the sky." The word "céu" is a nice complication: the acute accent marks an open, stressed e, and the u after it is a w glide, so the whole thing is one syllable, "SEH-oo." Then "é azul" links straight across into the vocalized l ending.
Where English speakers slip
The recurring mistake is over-applying the "de" rule and saying "djoo," but palatalization needs an i-sound to trigger it and there isn't one here. The other issue is failing to contract at all: learners write "de o livro" because it feels more transparent, and Brazilians find it jarring in a way that goes beyond style — the contracted form is the only correct one.