can perseverate
Regular verb: perseverate - perseverated- perseverated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can perseverate
you can perseverate
she can perseverate
we can perseverate
you can perseverate
they can perseverate 	I can be perseverating
you can be perseverating
she can be perseverating
we can be perseverating
you can be perseverating
they can be perseverating	I can have perseverated
you can have perseverated
she can have perseverated
we can have perseverated
you can have perseverated
they can have perseverated	I can have been perseverating
you can have been perseverating
she can have been perseverating
we can have been perseverating
you can have been perseverating
they can have been perseverating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot perseverate
you cannot perseverate
she cannot perseverate
we cannot perseverate
you cannot perseverate
they cannot perseverate 	I cannot be perseverating
you cannot be perseverating
she cannot be perseverating
we cannot be perseverating
you cannot be perseverating
they cannot be perseverating	I cannot have perseverated
you cannot have perseverated
she cannot have perseverated
we cannot have perseverated
you cannot have perseverated
they cannot have perseverated	I cannot have been perseverating
you cannot have been perseverating
she cannot have been perseverating
we cannot have been perseverating
you cannot have been perseverating
they cannot have been perseverating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I perseverate?
can you perseverate?
can she perseverate?
can we perseverate?
can you perseverate?
can they perseverate? 	can I be perseverating?
can you be perseverating?
can she be perseverating?
can we be perseverating?
can you be perseverating?
can they be perseverating? 	can I have perseverated?
can you have perseverated?
can she have perseverated?
can we have perseverated?
can you have perseverated?
can they have perseverated? 	can I have been perseverating?
can you have been perseverating?
can she have been perseverating?
can we have been perseverating?
can you have been perseverating?
can they have been perseverating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not perseverate?
can you not perseverate?
can she not perseverate?
can we not perseverate?
can you not perseverate?
can they not perseverate? 	can I not be perseverating?
can you not be perseverating?
can she not be perseverating?
can we not be perseverating?
can you not be perseverating?
can they not be perseverating? 	can I not have perseverated?
can you not have perseverated?
can she not have perseverated?
can we not have perseverated?
can you not have perseverated?
can they not have perseverated? 	can I not have been perseverating?
can you not have been perseverating?
can she not have been perseverating?
can we not have been perseverating?
can you not have been perseverating?
can they not have been perseverating?