can reason
Regular verb: reason - reasoned- reasoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can reason
you can reason
she can reason
we can reason
you can reason
they can reason 	I can be reasoning
you can be reasoning
she can be reasoning
we can be reasoning
you can be reasoning
they can be reasoning	I can have reasoned
you can have reasoned
she can have reasoned
we can have reasoned
you can have reasoned
they can have reasoned	I can have been reasoning
you can have been reasoning
she can have been reasoning
we can have been reasoning
you can have been reasoning
they can have been reasoning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot reason
you cannot reason
she cannot reason
we cannot reason
you cannot reason
they cannot reason 	I cannot be reasoning
you cannot be reasoning
she cannot be reasoning
we cannot be reasoning
you cannot be reasoning
they cannot be reasoning	I cannot have reasoned
you cannot have reasoned
she cannot have reasoned
we cannot have reasoned
you cannot have reasoned
they cannot have reasoned	I cannot have been reasoning
you cannot have been reasoning
she cannot have been reasoning
we cannot have been reasoning
you cannot have been reasoning
they cannot have been reasoning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I reason?
can you reason?
can she reason?
can we reason?
can you reason?
can they reason? 	can I be reasoning?
can you be reasoning?
can she be reasoning?
can we be reasoning?
can you be reasoning?
can they be reasoning? 	can I have reasoned?
can you have reasoned?
can she have reasoned?
can we have reasoned?
can you have reasoned?
can they have reasoned? 	can I have been reasoning?
can you have been reasoning?
can she have been reasoning?
can we have been reasoning?
can you have been reasoning?
can they have been reasoning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not reason?
can you not reason?
can she not reason?
can we not reason?
can you not reason?
can they not reason? 	can I not be reasoning?
can you not be reasoning?
can she not be reasoning?
can we not be reasoning?
can you not be reasoning?
can they not be reasoning? 	can I not have reasoned?
can you not have reasoned?
can she not have reasoned?
can we not have reasoned?
can you not have reasoned?
can they not have reasoned? 	can I not have been reasoning?
can you not have been reasoning?
can she not have been reasoning?
can we not have been reasoning?
can you not have been reasoning?
can they not have been reasoning?