English verb conjugation
CAN TAP

Regular verb: tap - tapped - tapped

Affirmation

Simple form	V-ing form
I can tap you can tap he can tap we can tap you can tap they can tap	I can be tapping you can be tapping he can be tapping we can be tapping you can be tapping they can be tapping
Perfect	V-ing perfect
I can have tapped you can have tapped he can have tapped we can have tapped you can have tapped they can have tapped	I can have been tapping you can have been tapping he can have been tapping we can have been tapping you can have been tapping they can have been tapping

Negation

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

Interrogative form

Simple form	V-ing form
can I tap? can you tap? can he tap? can we tap? can you tap? can they tap?	can I be tapping? can you be tapping? can he be tapping? can we be tapping? can you be tapping? can they be tapping?
Perfect	V-ing perfect
can I have tapped? can you have tapped? can he have tapped? can we have tapped? can you have tapped? can they have tapped?	can I have been tapping? can you have been tapping? can he have been tapping? can we have been tapping? can you have been tapping? can they have been tapping?

Interro-negative form

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