Conjugação do verbo inglês
COULD CONTRIBUTE

Verbo regular: contribute - contributed - contributed

Afirmação

Forma simple	Forma com V-ing
I could contribute you could contribute he could contribute we could contribute you could contribute they could contribute	I could be contributing you could be contributing he could be contributing we could be contributing you could be contributing they could be contributing
Perfeito	Perfeito com V-ing
I could have contributed you could have contributed he could have contributed we could have contributed you could have contributed they could have contributed	I could have been contributing you could have been contributing he could have been contributing we could have been contributing you could have been contributing they could have been contributing

Negação

Forma simple	Forma com V-ing
I could not contribute you could not contribute he could not contribute we could not contribute you could not contribute they could not contribute	I could not be contributing you could not be contributing he could not be contributing we could not be contributing you could not be contributing they could not be contributing
Perfeito	Perfeito com V-ing
I could not have contributed you could not have contributed he could not have contributed we could not have contributed you could not have contributed they could not have contributed	I could not have been contributing you could not have been contributing he could not have been contributing we could not have been contributing you could not have been contributing they could not have been contributing

Forma interrogativa

Forma simple	Forma com V-ing
could I contribute? could you contribute? could he contribute? could we contribute? could you contribute? could they contribute?	could I be contributing? could you be contributing? could he be contributing? could we be contributing? could you be contributing? could they be contributing?
Perfeito	Perfeito com V-ing
could I have contributed? could you have contributed? could he have contributed? could we have contributed? could you have contributed? could they have contributed?	could I have been contributing? could you have been contributing? could he have been contributing? could we have been contributing? could you have been contributing? could they have been contributing?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not contribute? could you not contribute? could he not contribute? could we not contribute? could you not contribute? could they not contribute?	could I not be contributing? could you not be contributing? could he not be contributing? could we not be contributing? could you not be contributing? could they not be contributing?
Perfeito	Perfeito com V-ing
could I not have contributed? could you not have contributed? could he not have contributed? could we not have contributed? could you not have contributed? could they not have contributed?	could I not have been contributing? could you not have been contributing? could he not have been contributing? could we not have been contributing? could you not have been contributing? could they not have been contributing?