English verb conjugation
SHOULD RESEARCH

Regular verb: research - researched - researched

Affirmation

Simple form	V-ing form
I'd research you'd research she'd research we'd research you'd research they'd research	I'd be researching you'd be researching she'd be researching we'd be researching you'd be researching they'd be researching
Perfect	V-ing perfect
I should've researched you should've researched she should've researched we should've researched you should've researched they should've researched	I should've been researching you should've been researching she should've been researching we should've been researching you should've been researching they should've been researching

Negation

Simple form	V-ing form
I shouldn't research you shouldn't research she shouldn't research we shouldn't research you shouldn't research they shouldn't research	I shouldn't be researching you shouldn't be researching she shouldn't be researching we shouldn't be researching you shouldn't be researching they shouldn't be researching
Perfect	V-ing perfect
I shouldn't have researched you shouldn't have researched she shouldn't have researched we shouldn't have researched you shouldn't have researched they shouldn't have researched	I shouldn't have been researching you shouldn't have been researching she shouldn't have been researching we shouldn't have been researching you shouldn't have been researching they shouldn't have been researching

Interrogative form

Simple form	V-ing form
should I research? should you research? should she research? should we research? should you research? should they research?	should I be researching? should you be researching? should she be researching? should we be researching? should you be researching? should they be researching?
Perfect	V-ing perfect
should I have researched? should you have researched? should she have researched? should we have researched? should you have researched? should they have researched?	should I have been researching? should you have been researching? should she have been researching? should we have been researching? should you have been researching? should they have been researching?

Interro-negative form

Simple form	V-ing form
shouldn't I research? shouldn't you research? shouldn't she research? shouldn't we research? shouldn't you research? shouldn't they research?	shouldn't I be researching? shouldn't you be researching? shouldn't she be researching? shouldn't we be researching? shouldn't you be researching? shouldn't they be researching?
Perfect	V-ing perfect
shouldn't I have researched? shouldn't you have researched? shouldn't she have researched? shouldn't we have researched? shouldn't you have researched? shouldn't they have researched?	shouldn't I have been researching? shouldn't you have been researching? shouldn't she have been researching? shouldn't we have been researching? shouldn't you have been researching? shouldn't they have been researching?