can persevere
Regular verb: persevere - persevered- persevered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can persevere
you can persevere
he can persevere
we can persevere
you can persevere
they can persevere 	I can be persevering
you can be persevering
he can be persevering
we can be persevering
you can be persevering
they can be persevering	I can have persevered
you can have persevered
he can have persevered
we can have persevered
you can have persevered
they can have persevered	I can have been persevering
you can have been persevering
he can have been persevering
we can have been persevering
you can have been persevering
they can have been persevering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't persevere
you can't persevere
he can't persevere
we can't persevere
you can't persevere
they can't persevere 	I can't be persevering
you can't be persevering
he can't be persevering
we can't be persevering
you can't be persevering
they can't be persevering	I can't have persevered
you can't have persevered
he can't have persevered
we can't have persevered
you can't have persevered
they can't have persevered	I can't have been persevering
you can't have been persevering
he can't have been persevering
we can't have been persevering
you can't have been persevering
they can't have been persevering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I persevere?
can you persevere?
can he persevere?
can we persevere?
can you persevere?
can they persevere? 	can I be persevering?
can you be persevering?
can he be persevering?
can we be persevering?
can you be persevering?
can they be persevering? 	can I have persevered?
can you have persevered?
can he have persevered?
can we have persevered?
can you have persevered?
can they have persevered? 	can I have been persevering?
can you have been persevering?
can he have been persevering?
can we have been persevering?
can you have been persevering?
can they have been persevering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I persevere?
can't you persevere?
can't he persevere?
can't we persevere?
can't you persevere?
can't they persevere? 	can't I be persevering?
can't you be persevering?
can't he be persevering?
can't we be persevering?
can't you be persevering?
can't they be persevering? 	can't I have persevered?
can't you have persevered?
can't he have persevered?
can't we have persevered?
can't you have persevered?
can't they have persevered? 	can't I have been persevering?
can't you have been persevering?
can't he have been persevering?
can't we have been persevering?
can't you have been persevering?
can't they have been persevering?