can sketch
Regular verb: sketch - sketched- sketched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sketch
you can sketch
he can sketch
we can sketch
you can sketch
they can sketch 	I can be sketching
you can be sketching
he can be sketching
we can be sketching
you can be sketching
they can be sketching	I can have sketched
you can have sketched
he can have sketched
we can have sketched
you can have sketched
they can have sketched	I can have been sketching
you can have been sketching
he can have been sketching
we can have been sketching
you can have been sketching
they can have been sketching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't sketch
you can't sketch
he can't sketch
we can't sketch
you can't sketch
they can't sketch 	I can't be sketching
you can't be sketching
he can't be sketching
we can't be sketching
you can't be sketching
they can't be sketching	I can't have sketched
you can't have sketched
he can't have sketched
we can't have sketched
you can't have sketched
they can't have sketched	I can't have been sketching
you can't have been sketching
he can't have been sketching
we can't have been sketching
you can't have been sketching
they can't have been sketching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sketch?
can you sketch?
can he sketch?
can we sketch?
can you sketch?
can they sketch? 	can I be sketching?
can you be sketching?
can he be sketching?
can we be sketching?
can you be sketching?
can they be sketching? 	can I have sketched?
can you have sketched?
can he have sketched?
can we have sketched?
can you have sketched?
can they have sketched? 	can I have been sketching?
can you have been sketching?
can he have been sketching?
can we have been sketching?
can you have been sketching?
can they have been sketching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I sketch?
can't you sketch?
can't he sketch?
can't we sketch?
can't you sketch?
can't they sketch? 	can't I be sketching?
can't you be sketching?
can't he be sketching?
can't we be sketching?
can't you be sketching?
can't they be sketching? 	can't I have sketched?
can't you have sketched?
can't he have sketched?
can't we have sketched?
can't you have sketched?
can't they have sketched? 	can't I have been sketching?
can't you have been sketching?
can't he have been sketching?
can't we have been sketching?
can't you have been sketching?
can't they have been sketching?