English verb conjugation
CAN MESS

Regular verb: mess - messed - messed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I can't mess you can't mess he can't mess we can't mess you can't mess they can't mess	I can't be messing you can't be messing he can't be messing we can't be messing you can't be messing they can't be messing
Perfect	V-ing perfect
I can't have messed you can't have messed he can't have messed we can't have messed you can't have messed they can't have messed	I can't have been messing you can't have been messing he can't have been messing we can't have been messing you can't have been messing they can't have been messing

Interrogative form

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