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dever
to owe, must
eudevo
você, eledeve
nósdevemos
vocês, elesdevem
Complete conjugation.
DEVER usually gets combined with another verb immediately following it to form powerful expressions.
dever + ser Ela deve sera apaixonada. She must be in love.
dever + ir Você deve ir. You should go.
dever + ter Deve ter sido amor. Must have been love.
dever + voltar Você deve voltar logo. You should return soon.
deveria Eu deveria ter ficado. I ought to have stayed.