can reason
Regular verb: reason - reasoned- reasoned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can reason
you can reason
he can reason
we can reason
you can reason
they can reason 	I can be reasoning
you can be reasoning
he can be reasoning
we can be reasoning
you can be reasoning
they can be reasoning	I can have reasoned
you can have reasoned
he 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
he 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
he 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
he 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
he 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
he 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 he reason?
can we reason?
can you reason?
can they reason? 	can I be reasoning?
can you be reasoning?
can he be reasoning?
can we be reasoning?
can you be reasoning?
can they be reasoning? 	can I have reasoned?
can you have reasoned?
can he 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 he 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 he 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 he 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 he 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 he have been reasoning?
can't we have been reasoning?
can't you have been reasoning?
can't they have been reasoning?