should research
Verbo regular: research - researched- researched

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should research
you should research
he should research
we should research
you should research
they should research 	I should be researching
you should be researching
he should be researching
we should be researching
you should be researching
they should be researching	I should have researched
you should have researched
he should have researched
we should have researched
you should have researched
they should have researched	I should have been researching
you should have been researching
he should have been researching
we should have been researching
you should have been researching
they should have been researching	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not research
you should not research
he should not research
we should not research
you should not research
they should not research 	I should not be researching
you should not be researching
he should not be researching
we should not be researching
you should not be researching
they should not be researching	I should not have researched
you should not have researched
he should not have researched
we should not have researched
you should not have researched
they should not have researched	I should not have been researching
you should not have been researching
he should not have been researching
we should not have been researching
you should not have been researching
they should not have been researching	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I research?
should you research?
should he research?
should we research?
should you research?
should they research? 	should I be researching?
should you be researching?
should he be researching?
should we be researching?
should you be researching?
should they be researching? 	should I have researched?
should you have researched?
should he 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 he have been researching?
should we have been researching?
should you have been researching?
should they have been researching? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not research?
should you not research?
should he not research?
should we not research?
should you not research?
should they not research? 	should I not be researching?
should you not be researching?
should he not be researching?
should we not be researching?
should you not be researching?
should they not be researching? 	should I not have researched?
should you not have researched?
should he not have researched?
should we not have researched?
should you not have researched?
should they not have researched? 	should I not have been researching?
should you not have been researching?
should he not have been researching?
should we not have been researching?
should you not have been researching?
should they not have been researching?