can zipper
Regular verb: zipper - zippered- zippered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can zipper
you can zipper
she can zipper
we can zipper
you can zipper
they can zipper 	I can be zippering
you can be zippering
she can be zippering
we can be zippering
you can be zippering
they can be zippering	I can have zippered
you can have zippered
she can have zippered
we can have zippered
you can have zippered
they can have zippered	I can have been zippering
you can have been zippering
she can have been zippering
we can have been zippering
you can have been zippering
they can have been zippering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot zipper
you cannot zipper
she cannot zipper
we cannot zipper
you cannot zipper
they cannot zipper 	I cannot be zippering
you cannot be zippering
she cannot be zippering
we cannot be zippering
you cannot be zippering
they cannot be zippering	I cannot have zippered
you cannot have zippered
she cannot have zippered
we cannot have zippered
you cannot have zippered
they cannot have zippered	I cannot have been zippering
you cannot have been zippering
she cannot have been zippering
we cannot have been zippering
you cannot have been zippering
they cannot have been zippering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I zipper?
can you zipper?
can she zipper?
can we zipper?
can you zipper?
can they zipper? 	can I be zippering?
can you be zippering?
can she be zippering?
can we be zippering?
can you be zippering?
can they be zippering? 	can I have zippered?
can you have zippered?
can she have zippered?
can we have zippered?
can you have zippered?
can they have zippered? 	can I have been zippering?
can you have been zippering?
can she have been zippering?
can we have been zippering?
can you have been zippering?
can they have been zippering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not zipper?
can you not zipper?
can she not zipper?
can we not zipper?
can you not zipper?
can they not zipper? 	can I not be zippering?
can you not be zippering?
can she not be zippering?
can we not be zippering?
can you not be zippering?
can they not be zippering? 	can I not have zippered?
can you not have zippered?
can she not have zippered?
can we not have zippered?
can you not have zippered?
can they not have zippered? 	can I not have been zippering?
can you not have been zippering?
can she not have been zippering?
can we not have been zippering?
can you not have been zippering?
can they not have been zippering?