can chap
Regular verb: chap - chapped- chapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can chap
you can chap
he can chap
we can chap
you can chap
they can chap 	I can be chapping
you can be chapping
he can be chapping
we can be chapping
you can be chapping
they can be chapping	I can have chapped
you can have chapped
he can have chapped
we can have chapped
you can have chapped
they can have chapped	I can have been chapping
you can have been chapping
he can have been chapping
we can have been chapping
you can have been chapping
they can have been chapping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot chap
you cannot chap
he cannot chap
we cannot chap
you cannot chap
they cannot chap 	I cannot be chapping
you cannot be chapping
he cannot be chapping
we cannot be chapping
you cannot be chapping
they cannot be chapping	I cannot have chapped
you cannot have chapped
he cannot have chapped
we cannot have chapped
you cannot have chapped
they cannot have chapped	I cannot have been chapping
you cannot have been chapping
he cannot have been chapping
we cannot have been chapping
you cannot have been chapping
they cannot have been chapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I chap?
can you chap?
can he chap?
can we chap?
can you chap?
can they chap? 	can I be chapping?
can you be chapping?
can he be chapping?
can we be chapping?
can you be chapping?
can they be chapping? 	can I have chapped?
can you have chapped?
can he have chapped?
can we have chapped?
can you have chapped?
can they have chapped? 	can I have been chapping?
can you have been chapping?
can he have been chapping?
can we have been chapping?
can you have been chapping?
can they have been chapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not chap?
can you not chap?
can he not chap?
can we not chap?
can you not chap?
can they not chap? 	can I not be chapping?
can you not be chapping?
can he not be chapping?
can we not be chapping?
can you not be chapping?
can they not be chapping? 	can I not have chapped?
can you not have chapped?
can he not have chapped?
can we not have chapped?
can you not have chapped?
can they not have chapped? 	can I not have been chapping?
can you not have been chapping?
can he not have been chapping?
can we not have been chapping?
can you not have been chapping?
can they not have been chapping?