I'd be contributing you'd be contributing he'd be contributing we'd be contributing you'd be contributing they'd be contributing
Perfecto
I should've contributed you should've contributed he should've contributed we should've contributed you should've contributed they should've contributed
Perfecto con V-ing
I should've been contributing you should've been contributing he should've been contributing we should've been contributing you should've been contributing they should've been contributing
Negación
Forma simple
I shouldn't contribute you shouldn't contribute he shouldn't contribute we shouldn't contribute you shouldn't contribute they shouldn't contribute
Forma con V-ing
I shouldn't be contributing you shouldn't be contributing he shouldn't be contributing we shouldn't be contributing you shouldn't be contributing they shouldn't be contributing
Perfecto
I shouldn't have contributed you shouldn't have contributed he shouldn't have contributed we shouldn't have contributed you shouldn't have contributed they shouldn't have contributed
Perfecto con V-ing
I shouldn't have been contributing you shouldn't have been contributing he shouldn't have been contributing we shouldn't have been contributing you shouldn't have been contributing they shouldn't have been contributing
Forma interrogativa
Forma simple
should I contribute? should you contribute? should he contribute? should we contribute? should you contribute? should they contribute?
Forma con V-ing
should I be contributing? should you be contributing? should he be contributing? should we be contributing? should you be contributing? should they be contributing?
Perfecto
should I have contributed? should you have contributed? should he have contributed? should we have contributed? should you have contributed? should they have contributed?
Perfecto con V-ing
should I have been contributing? should you have been contributing? should he have been contributing? should we have been contributing? should you have been contributing? should they have been contributing?
Forma interro-negativa
Forma simple
shouldn't I contribute? shouldn't you contribute? shouldn't he contribute? shouldn't we contribute? shouldn't you contribute? shouldn't they contribute?
Forma con V-ing
shouldn't I be contributing? shouldn't you be contributing? shouldn't he be contributing? shouldn't we be contributing? shouldn't you be contributing? shouldn't they be contributing?
Perfecto
shouldn't I have contributed? shouldn't you have contributed? shouldn't he have contributed? shouldn't we have contributed? shouldn't you have contributed? shouldn't they have contributed?
Perfecto con V-ing
shouldn't I have been contributing? shouldn't you have been contributing? shouldn't he have been contributing? shouldn't we have been contributing? shouldn't you have been contributing? shouldn't they have been contributing?