can scab
Regular verb: scab - scabbed- scabbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can scab
you can scab
she can scab
we can scab
you can scab
they can scab 	I can be scabbing
you can be scabbing
she can be scabbing
we can be scabbing
you can be scabbing
they can be scabbing	I can have scabbed
you can have scabbed
she can have scabbed
we can have scabbed
you can have scabbed
they can have scabbed	I can have been scabbing
you can have been scabbing
she can have been scabbing
we can have been scabbing
you can have been scabbing
they can have been scabbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot scab
you cannot scab
she cannot scab
we cannot scab
you cannot scab
they cannot scab 	I cannot be scabbing
you cannot be scabbing
she cannot be scabbing
we cannot be scabbing
you cannot be scabbing
they cannot be scabbing	I cannot have scabbed
you cannot have scabbed
she cannot have scabbed
we cannot have scabbed
you cannot have scabbed
they cannot have scabbed	I cannot have been scabbing
you cannot have been scabbing
she cannot have been scabbing
we cannot have been scabbing
you cannot have been scabbing
they cannot have been scabbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I scab?
can you scab?
can she scab?
can we scab?
can you scab?
can they scab? 	can I be scabbing?
can you be scabbing?
can she be scabbing?
can we be scabbing?
can you be scabbing?
can they be scabbing? 	can I have scabbed?
can you have scabbed?
can she have scabbed?
can we have scabbed?
can you have scabbed?
can they have scabbed? 	can I have been scabbing?
can you have been scabbing?
can she have been scabbing?
can we have been scabbing?
can you have been scabbing?
can they have been scabbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not scab?
can you not scab?
can she not scab?
can we not scab?
can you not scab?
can they not scab? 	can I not be scabbing?
can you not be scabbing?
can she not be scabbing?
can we not be scabbing?
can you not be scabbing?
can they not be scabbing? 	can I not have scabbed?
can you not have scabbed?
can she not have scabbed?
can we not have scabbed?
can you not have scabbed?
can they not have scabbed? 	can I not have been scabbing?
can you not have been scabbing?
can she not have been scabbing?
can we not have been scabbing?
can you not have been scabbing?
can they not have been scabbing?