Bonjour
Je porte une robe blanche.
(I wear a white dress) fem. sing.
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Je porte un manteau vert.
(I wear a green coat) masc. sing
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Je porte des chaussures noires.
(I wear black shoes) fem. plural
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Je porte un chapeau marron.
(I wear a brown hat) masc. sing.
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Je porte un pantalon rouge.
( I wear red trousers) masc. plural in English; masc. singular in French
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Je porte un short rouge.
(I wear red shorts) masc. plural in English ; masc. singular in French
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Je porte un jean noir.
(I wear black jeans) masc. plural in English; masc. singular in French
In English you say "trousers, pants, shorts ..." because you mean a pair of jeans ...
In French we put everything in singular : un pantalon, un jean, un short
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Hope I helped ☺☺☺