Conjugación del verbo inglés
COULD CONTRIBUTE

Verbo regular: contribute - contributed - contributed

Afirmación

Forma simple	Forma con V-ing
I could contribute you could contribute she could contribute we could contribute you could contribute they could contribute	I could be contributing you could be contributing she could be contributing we could be contributing you could be contributing they could be contributing
Perfecto	Perfecto con V-ing
I could have contributed you could have contributed she 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 she could have been contributing we could have been contributing you could have been contributing they could have been contributing

Negación

Forma simple	Forma con V-ing
I could not contribute you could not contribute she 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 she could not be contributing we could not be contributing you could not be contributing they could not be contributing
Perfecto	Perfecto con V-ing
I could not have contributed you could not have contributed she 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 she 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 con V-ing
could I contribute? could you contribute? could she contribute? could we contribute? could you contribute? could they contribute?	could I be contributing? could you be contributing? could she be contributing? could we be contributing? could you be contributing? could they be contributing?
Perfecto	Perfecto con V-ing
could I have contributed? could you have contributed? could she 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 she have been contributing? could we have been contributing? could you have been contributing? could they have been contributing?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not contribute? could you not contribute? could she 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 she not be contributing? could we not be contributing? could you not be contributing? could they not be contributing?
Perfecto	Perfecto con V-ing
could I not have contributed? could you not have contributed? could she 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 she not have been contributing? could we not have been contributing? could you not have been contributing? could they not have been contributing?