can mess
Regular verb: mess - messed- messed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can mess
you can mess
he can mess
we can mess
you can mess
they can mess 	I can be messing
you can be messing
he can be messing
we can be messing
you can be messing
they can be messing	I can have messed
you can have messed
he can have messed
we can have messed
you can have messed
they can have messed	I can have been messing
you can have been messing
he can have been messing
we can have been messing
you can have been messing
they can have been messing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot mess
you cannot mess
he cannot mess
we cannot mess
you cannot mess
they cannot mess 	I cannot be messing
you cannot be messing
he cannot be messing
we cannot be messing
you cannot be messing
they cannot be messing	I cannot have messed
you cannot have messed
he cannot have messed
we cannot have messed
you cannot have messed
they cannot have messed	I cannot have been messing
you cannot have been messing
he cannot have been messing
we cannot have been messing
you cannot have been messing
they cannot have been messing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I mess?
can you mess?
can he mess?
can we mess?
can you mess?
can they mess? 	can I be messing?
can you be messing?
can he be messing?
can we be messing?
can you be messing?
can they be messing? 	can I have messed?
can you have messed?
can he have messed?
can we have messed?
can you have messed?
can they have messed? 	can I have been messing?
can you have been messing?
can he have been messing?
can we have been messing?
can you have been messing?
can they have been messing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not mess?
can you not mess?
can he not mess?
can we not mess?
can you not mess?
can they not mess? 	can I not be messing?
can you not be messing?
can he not be messing?
can we not be messing?
can you not be messing?
can they not be messing? 	can I not have messed?
can you not have messed?
can he not have messed?
can we not have messed?
can you not have messed?
can they not have messed? 	can I not have been messing?
can you not have been messing?
can he not have been messing?
can we not have been messing?
can you not have been messing?
can they not have been messing?