can krass
Regular verb: krass - krassed- krassed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can krass
you can krass
he can krass
we can krass
you can krass
they can krass 	I can be krassing
you can be krassing
he can be krassing
we can be krassing
you can be krassing
they can be krassing	I can have krassed
you can have krassed
he can have krassed
we can have krassed
you can have krassed
they can have krassed	I can have been krassing
you can have been krassing
he can have been krassing
we can have been krassing
you can have been krassing
they can have been krassing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't krass
you can't krass
he can't krass
we can't krass
you can't krass
they can't krass 	I can't be krassing
you can't be krassing
he can't be krassing
we can't be krassing
you can't be krassing
they can't be krassing	I can't have krassed
you can't have krassed
he can't have krassed
we can't have krassed
you can't have krassed
they can't have krassed	I can't have been krassing
you can't have been krassing
he can't have been krassing
we can't have been krassing
you can't have been krassing
they can't have been krassing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I krass?
can you krass?
can he krass?
can we krass?
can you krass?
can they krass? 	can I be krassing?
can you be krassing?
can he be krassing?
can we be krassing?
can you be krassing?
can they be krassing? 	can I have krassed?
can you have krassed?
can he have krassed?
can we have krassed?
can you have krassed?
can they have krassed? 	can I have been krassing?
can you have been krassing?
can he have been krassing?
can we have been krassing?
can you have been krassing?
can they have been krassing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I krass?
can't you krass?
can't he krass?
can't we krass?
can't you krass?
can't they krass? 	can't I be krassing?
can't you be krassing?
can't he be krassing?
can't we be krassing?
can't you be krassing?
can't they be krassing? 	can't I have krassed?
can't you have krassed?
can't he have krassed?
can't we have krassed?
can't you have krassed?
can't they have krassed? 	can't I have been krassing?
can't you have been krassing?
can't he have been krassing?
can't we have been krassing?
can't you have been krassing?
can't they have been krassing?