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