English verb conjugation
COULD THUMP

Regular verb: thump - thumped - thumped

Affirmation

Simple form	V-ing form
I could thump you could thump he could thump we could thump you could thump they could thump	I could be thumping you could be thumping he could be thumping we could be thumping you could be thumping they could be thumping
Perfect	V-ing perfect
I could have thumped you could have thumped he could have thumped we could have thumped you could have thumped they could have thumped	I could have been thumping you could have been thumping he could have been thumping we could have been thumping you could have been thumping they could have been thumping

Negation

Simple form	V-ing form
I could not thump you could not thump he could not thump we could not thump you could not thump they could not thump	I could not be thumping you could not be thumping he could not be thumping we could not be thumping you could not be thumping they could not be thumping
Perfect	V-ing perfect
I could not have thumped you could not have thumped he could not have thumped we could not have thumped you could not have thumped they could not have thumped	I could not have been thumping you could not have been thumping he could not have been thumping we could not have been thumping you could not have been thumping they could not have been thumping

Interrogative form

Simple form	V-ing form
could I thump? could you thump? could he thump? could we thump? could you thump? could they thump?	could I be thumping? could you be thumping? could he be thumping? could we be thumping? could you be thumping? could they be thumping?
Perfect	V-ing perfect
could I have thumped? could you have thumped? could he have thumped? could we have thumped? could you have thumped? could they have thumped?	could I have been thumping? could you have been thumping? could he have been thumping? could we have been thumping? could you have been thumping? could they have been thumping?

Interro-negative form

Simple form	V-ing form
could I not thump? could you not thump? could he not thump? could we not thump? could you not thump? could they not thump?	could I not be thumping? could you not be thumping? could he not be thumping? could we not be thumping? could you not be thumping? could they not be thumping?
Perfect	V-ing perfect
could I not have thumped? could you not have thumped? could he not have thumped? could we not have thumped? could you not have thumped? could they not have thumped?	could I not have been thumping? could you not have been thumping? could he not have been thumping? could we not have been thumping? could you not have been thumping? could they not have been thumping?