can snack
Regular verb: snack - snacked- snacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can snack
you can snack
she can snack
we can snack
you can snack
they can snack 	I can be snacking
you can be snacking
she can be snacking
we can be snacking
you can be snacking
they can be snacking	I can have snacked
you can have snacked
she can have snacked
we can have snacked
you can have snacked
they can have snacked	I can have been snacking
you can have been snacking
she can have been snacking
we can have been snacking
you can have been snacking
they can have been snacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot snack
you cannot snack
she cannot snack
we cannot snack
you cannot snack
they cannot snack 	I cannot be snacking
you cannot be snacking
she cannot be snacking
we cannot be snacking
you cannot be snacking
they cannot be snacking	I cannot have snacked
you cannot have snacked
she cannot have snacked
we cannot have snacked
you cannot have snacked
they cannot have snacked	I cannot have been snacking
you cannot have been snacking
she cannot have been snacking
we cannot have been snacking
you cannot have been snacking
they cannot have been snacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I snack?
can you snack?
can she snack?
can we snack?
can you snack?
can they snack? 	can I be snacking?
can you be snacking?
can she be snacking?
can we be snacking?
can you be snacking?
can they be snacking? 	can I have snacked?
can you have snacked?
can she have snacked?
can we have snacked?
can you have snacked?
can they have snacked? 	can I have been snacking?
can you have been snacking?
can she have been snacking?
can we have been snacking?
can you have been snacking?
can they have been snacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not snack?
can you not snack?
can she not snack?
can we not snack?
can you not snack?
can they not snack? 	can I not be snacking?
can you not be snacking?
can she not be snacking?
can we not be snacking?
can you not be snacking?
can they not be snacking? 	can I not have snacked?
can you not have snacked?
can she not have snacked?
can we not have snacked?
can you not have snacked?
can they not have snacked? 	can I not have been snacking?
can you not have been snacking?
can she not have been snacking?
can we not have been snacking?
can you not have been snacking?
can they not have been snacking?