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 couldn't tap you couldn't tap he couldn't tap we couldn't tap you couldn't tap they couldn't tap	I couldn't be tapping you couldn't be tapping he couldn't be tapping we couldn't be tapping you couldn't be tapping they couldn't be tapping
Perfect	V-ing perfect
I couldn't have tapped you couldn't have tapped he couldn't have tapped we couldn't have tapped you couldn't have tapped they couldn't have tapped	I couldn't have been tapping you couldn't have been tapping he couldn't have been tapping we couldn't have been tapping you couldn't have been tapping they couldn't 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
couldn't I tap? couldn't you tap? couldn't he tap? couldn't we tap? couldn't you tap? couldn't they tap?	couldn't I be tapping? couldn't you be tapping? couldn't he be tapping? couldn't we be tapping? couldn't you be tapping? couldn't they be tapping?
Perfect	V-ing perfect
couldn't I have tapped? couldn't you have tapped? couldn't he have tapped? couldn't we have tapped? couldn't you have tapped? couldn't they have tapped?	couldn't I have been tapping? couldn't you have been tapping? couldn't he have been tapping? couldn't we have been tapping? couldn't you have been tapping? couldn't they have been tapping?