Conjugação do verbo inglês
COULD SMILE

Verbo regular: smile - smiled - smiled

Afirmação

Forma simple	Forma com V-ing
I could smile you could smile she could smile we could smile you could smile they could smile	I could be smiling you could be smiling she could be smiling we could be smiling you could be smiling they could be smiling
Perfeito	Perfeito com V-ing
I could have smiled you could have smiled she could have smiled we could have smiled you could have smiled they could have smiled	I could have been smiling you could have been smiling she could have been smiling we could have been smiling you could have been smiling they could have been smiling

Negação

Forma simple	Forma com V-ing
I couldn't smile you couldn't smile she couldn't smile we couldn't smile you couldn't smile they couldn't smile	I couldn't be smiling you couldn't be smiling she couldn't be smiling we couldn't be smiling you couldn't be smiling they couldn't be smiling
Perfeito	Perfeito com V-ing
I couldn't have smiled you couldn't have smiled she couldn't have smiled we couldn't have smiled you couldn't have smiled they couldn't have smiled	I couldn't have been smiling you couldn't have been smiling she couldn't have been smiling we couldn't have been smiling you couldn't have been smiling they couldn't have been smiling

Forma interrogativa

Forma simple	Forma com V-ing
could I smile? could you smile? could she smile? could we smile? could you smile? could they smile?	could I be smiling? could you be smiling? could she be smiling? could we be smiling? could you be smiling? could they be smiling?
Perfeito	Perfeito com V-ing
could I have smiled? could you have smiled? could she have smiled? could we have smiled? could you have smiled? could they have smiled?	could I have been smiling? could you have been smiling? could she have been smiling? could we have been smiling? could you have been smiling? could they have been smiling?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I smile? couldn't you smile? couldn't she smile? couldn't we smile? couldn't you smile? couldn't they smile?	couldn't I be smiling? couldn't you be smiling? couldn't she be smiling? couldn't we be smiling? couldn't you be smiling? couldn't they be smiling?
Perfeito	Perfeito com V-ing
couldn't I have smiled? couldn't you have smiled? couldn't she have smiled? couldn't we have smiled? couldn't you have smiled? couldn't they have smiled?	couldn't I have been smiling? couldn't you have been smiling? couldn't she have been smiling? couldn't we have been smiling? couldn't you have been smiling? couldn't they have been smiling?