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 can't reason
you can't reason
she can't reason
we can't reason
you can't reason
they can't reason 	I can't be reasoning
you can't be reasoning
she can't be reasoning
we can't be reasoning
you can't be reasoning
they can't be reasoning	I can't have reasoned
you can't have reasoned
she can't have reasoned
we can't have reasoned
you can't have reasoned
they can't have reasoned	I can't have been reasoning
you can't have been reasoning
she can't have been reasoning
we can't have been reasoning
you can't have been reasoning
they can't 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't I reason?
can't you reason?
can't she reason?
can't we reason?
can't you reason?
can't they reason? 	can't I be reasoning?
can't you be reasoning?
can't she be reasoning?
can't we be reasoning?
can't you be reasoning?
can't they be reasoning? 	can't I have reasoned?
can't you have reasoned?
can't she have reasoned?
can't we have reasoned?
can't you have reasoned?
can't they have reasoned? 	can't I have been reasoning?
can't you have been reasoning?
can't she have been reasoning?
can't we have been reasoning?
can't you have been reasoning?
can't they have been reasoning?