Conjugación del verbo inglés
CAN CONTRIBUTE

Verbo regular: contribute - contributed - contributed

Afirmación

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

Negación

Forma simple	Forma con V-ing
I cannot contribute you cannot contribute he cannot contribute we cannot contribute you cannot contribute they cannot contribute	I cannot be contributing you cannot be contributing he cannot be contributing we cannot be contributing you cannot be contributing they cannot be contributing
Perfecto	Perfecto con V-ing
I cannot have contributed you cannot have contributed he cannot have contributed we cannot have contributed you cannot have contributed they cannot have contributed	I cannot have been contributing you cannot have been contributing he cannot have been contributing we cannot have been contributing you cannot have been contributing they cannot have been contributing

Forma interrogativa

Forma simple	Forma con V-ing
can I contribute? can you contribute? can he contribute? can we contribute? can you contribute? can they contribute?	can I be contributing? can you be contributing? can he be contributing? can we be contributing? can you be contributing? can they be contributing?
Perfecto	Perfecto con V-ing
can I have contributed? can you have contributed? can he have contributed? can we have contributed? can you have contributed? can they have contributed?	can I have been contributing? can you have been contributing? can he have been contributing? can we have been contributing? can you have been contributing? can they have been contributing?

Forma interro-negativa

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