You wrote
The (mistake, should be: red ones) reds ones are sweeter
Correct
The (fixed) red ones are sweeter
Adjectives never take -s
3 mistakes
Em português o adjetivo concorda com o substantivo ('praias lindas'). Em inglês ele nunca muda: 'beautiful beaches', 'different shops'. Só o substantivo ganha -s.
In English the describing word stays the same whether the noun is singular or plural: a beautiful beach, beautiful beaches. Only the noun gets the -s.
O -s fica só no substantivo. Adjetivo não muda nunca.
Wrong: We saw some beautifuls beaches
Right: We saw some beautiful beaches
Wrong: No, they are very differents
Right: No, they are very different
Wrong: The reds ones are sweeter
Right: The red ones are sweeter
The (mistake, should be: red ones) reds ones are sweeter
The (fixed) red ones are sweeter
No, they are very (mistake, should be: different) differents
No, they are very (fixed) different
We saw some (mistake, should be: beautiful) beautifuls beaches
We saw some (fixed) beautiful beaches