Conjugação do verbo inglês
COULD STAIN

Verbo regular: stain - stained - stained

Afirmação

Forma simple	Forma com V-ing
I could stain you could stain she could stain we could stain you could stain they could stain	I could be staining you could be staining she could be staining we could be staining you could be staining they could be staining
Perfeito	Perfeito com V-ing
I could have stained you could have stained she could have stained we could have stained you could have stained they could have stained	I could have been staining you could have been staining she could have been staining we could have been staining you could have been staining they could have been staining

Negação

Forma simple	Forma com V-ing
I couldn't stain you couldn't stain she couldn't stain we couldn't stain you couldn't stain they couldn't stain	I couldn't be staining you couldn't be staining she couldn't be staining we couldn't be staining you couldn't be staining they couldn't be staining
Perfeito	Perfeito com V-ing
I couldn't have stained you couldn't have stained she couldn't have stained we couldn't have stained you couldn't have stained they couldn't have stained	I couldn't have been staining you couldn't have been staining she couldn't have been staining we couldn't have been staining you couldn't have been staining they couldn't have been staining

Forma interrogativa

Forma simple	Forma com V-ing
could I stain? could you stain? could she stain? could we stain? could you stain? could they stain?	could I be staining? could you be staining? could she be staining? could we be staining? could you be staining? could they be staining?
Perfeito	Perfeito com V-ing
could I have stained? could you have stained? could she have stained? could we have stained? could you have stained? could they have stained?	could I have been staining? could you have been staining? could she have been staining? could we have been staining? could you have been staining? could they have been staining?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I stain? couldn't you stain? couldn't she stain? couldn't we stain? couldn't you stain? couldn't they stain?	couldn't I be staining? couldn't you be staining? couldn't she be staining? couldn't we be staining? couldn't you be staining? couldn't they be staining?
Perfeito	Perfeito com V-ing
couldn't I have stained? couldn't you have stained? couldn't she have stained? couldn't we have stained? couldn't you have stained? couldn't they have stained?	couldn't I have been staining? couldn't you have been staining? couldn't she have been staining? couldn't we have been staining? couldn't you have been staining? couldn't they have been staining?