can kern
Regular verb: kern - kerned- kerned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can kern
you can kern
she can kern
we can kern
you can kern
they can kern 	I can be kerning
you can be kerning
she can be kerning
we can be kerning
you can be kerning
they can be kerning	I can have kerned
you can have kerned
she 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
she 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 cannot kern
you cannot kern
she cannot kern
we cannot kern
you cannot kern
they cannot kern 	I cannot be kerning
you cannot be kerning
she cannot be kerning
we cannot be kerning
you cannot be kerning
they cannot be kerning	I cannot have kerned
you cannot have kerned
she cannot have kerned
we cannot have kerned
you cannot have kerned
they cannot have kerned	I cannot have been kerning
you cannot have been kerning
she cannot have been kerning
we cannot have been kerning
you cannot have been kerning
they cannot have been kerning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I kern?
can you kern?
can she kern?
can we kern?
can you kern?
can they kern? 	can I be kerning?
can you be kerning?
can she be kerning?
can we be kerning?
can you be kerning?
can they be kerning? 	can I have kerned?
can you have kerned?
can she 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 she 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 I not kern?
can you not kern?
can she not kern?
can we not kern?
can you not kern?
can they not kern? 	can I not be kerning?
can you not be kerning?
can she not be kerning?
can we not be kerning?
can you not be kerning?
can they not be kerning? 	can I not have kerned?
can you not have kerned?
can she not have kerned?
can we not have kerned?
can you not have kerned?
can they not have kerned? 	can I not have been kerning?
can you not have been kerning?
can she not have been kerning?
can we not have been kerning?
can you not have been kerning?
can they not have been kerning?