could tap
Regular verb: tap - tapped- tapped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tap
you could tap
she could tap
we could tap
you could tap
they could tap 	I could be tapping
you could be tapping
she could be tapping
we could be tapping
you could be tapping
they could be tapping	I could have tapped
you could have tapped
she could have tapped
we could have tapped
you could have tapped
they could have tapped	I could have been tapping
you could have been tapping
she could have been tapping
we could have been tapping
you could have been tapping
they could have been tapping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not tap
you could not tap
she could not tap
we could not tap
you could not tap
they could not tap 	I could not be tapping
you could not be tapping
she could not be tapping
we could not be tapping
you could not be tapping
they could not be tapping	I could not have tapped
you could not have tapped
she could not have tapped
we could not have tapped
you could not have tapped
they could not have tapped	I could not have been tapping
you could not have been tapping
she could not have been tapping
we could not have been tapping
you could not have been tapping
they could not have been tapping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tap?
could you tap?
could she tap?
could we tap?
could you tap?
could they tap? 	could I be tapping?
could you be tapping?
could she be tapping?
could we be tapping?
could you be tapping?
could they be tapping? 	could I have tapped?
could you have tapped?
could she have tapped?
could we have tapped?
could you have tapped?
could they have tapped? 	could I have been tapping?
could you have been tapping?
could she have been tapping?
could we have been tapping?
could you have been tapping?
could they have been tapping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not tap?
could you not tap?
could she not tap?
could we not tap?
could you not tap?
could they not tap? 	could I not be tapping?
could you not be tapping?
could she not be tapping?
could we not be tapping?
could you not be tapping?
could they not be tapping? 	could I not have tapped?
could you not have tapped?
could she not have tapped?
could we not have tapped?
could you not have tapped?
could they not have tapped? 	could I not have been tapping?
could you not have been tapping?
could she not have been tapping?
could we not have been tapping?
could you not have been tapping?
could they not have been tapping?