Conjugação do verbo inglês
COULD GRIN

Verbo regular: grin - grinned - grinned

Afirmação

Forma simple	Forma com V-ing
I could grin you could grin she could grin we could grin you could grin they could grin	I could be grinning you could be grinning she could be grinning we could be grinning you could be grinning they could be grinning
Perfeito	Perfeito com V-ing
I could have grinned you could have grinned she could have grinned we could have grinned you could have grinned they could have grinned	I could have been grinning you could have been grinning she could have been grinning we could have been grinning you could have been grinning they could have been grinning

Negação

Forma simple	Forma com V-ing
I could not grin you could not grin she could not grin we could not grin you could not grin they could not grin	I could not be grinning you could not be grinning she could not be grinning we could not be grinning you could not be grinning they could not be grinning
Perfeito	Perfeito com V-ing
I could not have grinned you could not have grinned she could not have grinned we could not have grinned you could not have grinned they could not have grinned	I could not have been grinning you could not have been grinning she could not have been grinning we could not have been grinning you could not have been grinning they could not have been grinning

Forma interrogativa

Forma simple	Forma com V-ing
could I grin? could you grin? could she grin? could we grin? could you grin? could they grin?	could I be grinning? could you be grinning? could she be grinning? could we be grinning? could you be grinning? could they be grinning?
Perfeito	Perfeito com V-ing
could I have grinned? could you have grinned? could she have grinned? could we have grinned? could you have grinned? could they have grinned?	could I have been grinning? could you have been grinning? could she have been grinning? could we have been grinning? could you have been grinning? could they have been grinning?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not grin? could you not grin? could she not grin? could we not grin? could you not grin? could they not grin?	could I not be grinning? could you not be grinning? could she not be grinning? could we not be grinning? could you not be grinning? could they not be grinning?
Perfeito	Perfeito com V-ing
could I not have grinned? could you not have grinned? could she not have grinned? could we not have grinned? could you not have grinned? could they not have grinned?	could I not have been grinning? could you not have been grinning? could she not have been grinning? could we not have been grinning? could you not have been grinning? could they not have been grinning?