can kern
Regular verb: kern - kerned- kerned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can kern
you can kern
he can kern
we can kern
you can kern
they can kern 	I can be kerning
you can be kerning
he can be kerning
we can be kerning
you can be kerning
they can be kerning	I can have kerned
you can have kerned
he can have kerned
we can have kerned
you can have kerned
they can have kerned	I can have been kerning
you can have been kerning
he can have been kerning
we can have been kerning
you can have been kerning
they can have been kerning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't kern
you can't kern
he can't kern
we can't kern
you can't kern
they can't kern 	I can't be kerning
you can't be kerning
he can't be kerning
we can't be kerning
you can't be kerning
they can't be kerning	I can't have kerned
you can't have kerned
he can't have kerned
we can't have kerned
you can't have kerned
they can't have kerned	I can't have been kerning
you can't have been kerning
he can't have been kerning
we can't have been kerning
you can't have been kerning
they can't have been kerning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I kern?
can you kern?
can he kern?
can we kern?
can you kern?
can they kern? 	can I be kerning?
can you be kerning?
can he be kerning?
can we be kerning?
can you be kerning?
can they be kerning? 	can I have kerned?
can you have kerned?
can he have kerned?
can we have kerned?
can you have kerned?
can they have kerned? 	can I have been kerning?
can you have been kerning?
can he have been kerning?
can we have been kerning?
can you have been kerning?
can they have been kerning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I kern?
can't you kern?
can't he kern?
can't we kern?
can't you kern?
can't they kern? 	can't I be kerning?
can't you be kerning?
can't he be kerning?
can't we be kerning?
can't you be kerning?
can't they be kerning? 	can't I have kerned?
can't you have kerned?
can't he have kerned?
can't we have kerned?
can't you have kerned?
can't they have kerned? 	can't I have been kerning?
can't you have been kerning?
can't he have been kerning?
can't we have been kerning?
can't you have been kerning?
can't they have been kerning?