Conjugação do verbo inglês
COULD TARNISH

Verbo regular: tarnish - tarnished - tarnished

Afirmação

Forma simple	Forma com V-ing
I could tarnish you could tarnish he could tarnish we could tarnish you could tarnish they could tarnish	I could be tarnishing you could be tarnishing he could be tarnishing we could be tarnishing you could be tarnishing they could be tarnishing
Perfeito	Perfeito com V-ing
I could have tarnished you could have tarnished he could have tarnished we could have tarnished you could have tarnished they could have tarnished	I could have been tarnishing you could have been tarnishing he could have been tarnishing we could have been tarnishing you could have been tarnishing they could have been tarnishing

Negação

Forma simple	Forma com V-ing
I couldn't tarnish you couldn't tarnish he couldn't tarnish we couldn't tarnish you couldn't tarnish they couldn't tarnish	I couldn't be tarnishing you couldn't be tarnishing he couldn't be tarnishing we couldn't be tarnishing you couldn't be tarnishing they couldn't be tarnishing
Perfeito	Perfeito com V-ing
I couldn't have tarnished you couldn't have tarnished he couldn't have tarnished we couldn't have tarnished you couldn't have tarnished they couldn't have tarnished	I couldn't have been tarnishing you couldn't have been tarnishing he couldn't have been tarnishing we couldn't have been tarnishing you couldn't have been tarnishing they couldn't have been tarnishing

Forma interrogativa

Forma simple	Forma com V-ing
could I tarnish? could you tarnish? could he tarnish? could we tarnish? could you tarnish? could they tarnish?	could I be tarnishing? could you be tarnishing? could he be tarnishing? could we be tarnishing? could you be tarnishing? could they be tarnishing?
Perfeito	Perfeito com V-ing
could I have tarnished? could you have tarnished? could he have tarnished? could we have tarnished? could you have tarnished? could they have tarnished?	could I have been tarnishing? could you have been tarnishing? could he have been tarnishing? could we have been tarnishing? could you have been tarnishing? could they have been tarnishing?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I tarnish? couldn't you tarnish? couldn't he tarnish? couldn't we tarnish? couldn't you tarnish? couldn't they tarnish?	couldn't I be tarnishing? couldn't you be tarnishing? couldn't he be tarnishing? couldn't we be tarnishing? couldn't you be tarnishing? couldn't they be tarnishing?
Perfeito	Perfeito com V-ing
couldn't I have tarnished? couldn't you have tarnished? couldn't he have tarnished? couldn't we have tarnished? couldn't you have tarnished? couldn't they have tarnished?	couldn't I have been tarnishing? couldn't you have been tarnishing? couldn't he have been tarnishing? couldn't we have been tarnishing? couldn't you have been tarnishing? couldn't they have been tarnishing?