English verb conjugation
COULD TAP

Regular verb: tap - tapped - tapped

Affirmation

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