can research
Regular verb: research - researched- researched

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot research
you cannot research
she cannot research
we cannot research
you cannot research
they cannot research 	I cannot be researching
you cannot be researching
she cannot be researching
we cannot be researching
you cannot be researching
they cannot be researching	I cannot have researched
you cannot have researched
she cannot have researched
we cannot have researched
you cannot have researched
they cannot have researched	I cannot have been researching
you cannot have been researching
she cannot have been researching
we cannot have been researching
you cannot have been researching
they cannot have been researching	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not research?
can you not research?
can she not research?
can we not research?
can you not research?
can they not research? 	can I not be researching?
can you not be researching?
can she not be researching?
can we not be researching?
can you not be researching?
can they not be researching? 	can I not have researched?
can you not have researched?
can she not have researched?
can we not have researched?
can you not have researched?
can they not have researched? 	can I not have been researching?
can you not have been researching?
can she not have been researching?
can we not have been researching?
can you not have been researching?
can they not have been researching?