can scratch
Regular verb: scratch - scratched- scratched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can scratch
you can scratch
she can scratch
we can scratch
you can scratch
they can scratch 	I can be scratching
you can be scratching
she can be scratching
we can be scratching
you can be scratching
they can be scratching	I can have scratched
you can have scratched
she can have scratched
we can have scratched
you can have scratched
they can have scratched	I can have been scratching
you can have been scratching
she can have been scratching
we can have been scratching
you can have been scratching
they can have been scratching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't scratch
you can't scratch
she can't scratch
we can't scratch
you can't scratch
they can't scratch 	I can't be scratching
you can't be scratching
she can't be scratching
we can't be scratching
you can't be scratching
they can't be scratching	I can't have scratched
you can't have scratched
she can't have scratched
we can't have scratched
you can't have scratched
they can't have scratched	I can't have been scratching
you can't have been scratching
she can't have been scratching
we can't have been scratching
you can't have been scratching
they can't have been scratching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I scratch?
can you scratch?
can she scratch?
can we scratch?
can you scratch?
can they scratch? 	can I be scratching?
can you be scratching?
can she be scratching?
can we be scratching?
can you be scratching?
can they be scratching? 	can I have scratched?
can you have scratched?
can she have scratched?
can we have scratched?
can you have scratched?
can they have scratched? 	can I have been scratching?
can you have been scratching?
can she have been scratching?
can we have been scratching?
can you have been scratching?
can they have been scratching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I scratch?
can't you scratch?
can't she scratch?
can't we scratch?
can't you scratch?
can't they scratch? 	can't I be scratching?
can't you be scratching?
can't she be scratching?
can't we be scratching?
can't you be scratching?
can't they be scratching? 	can't I have scratched?
can't you have scratched?
can't she have scratched?
can't we have scratched?
can't you have scratched?
can't they have scratched? 	can't I have been scratching?
can't you have been scratching?
can't she have been scratching?
can't we have been scratching?
can't you have been scratching?
can't they have been scratching?