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 couldn't thump you couldn't thump he couldn't thump we couldn't thump you couldn't thump they couldn't thump	I couldn't be thumping you couldn't be thumping he couldn't be thumping we couldn't be thumping you couldn't be thumping they couldn't be thumping
Perfect	V-ing perfect
I couldn't have thumped you couldn't have thumped he couldn't have thumped we couldn't have thumped you couldn't have thumped they couldn't have thumped	I couldn't have been thumping you couldn't have been thumping he couldn't have been thumping we couldn't have been thumping you couldn't have been thumping they couldn't 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
couldn't I thump? couldn't you thump? couldn't he thump? couldn't we thump? couldn't you thump? couldn't they thump?	couldn't I be thumping? couldn't you be thumping? couldn't he be thumping? couldn't we be thumping? couldn't you be thumping? couldn't they be thumping?
Perfect	V-ing perfect
couldn't I have thumped? couldn't you have thumped? couldn't he have thumped? couldn't we have thumped? couldn't you have thumped? couldn't they have thumped?	couldn't I have been thumping? couldn't you have been thumping? couldn't he have been thumping? couldn't we have been thumping? couldn't you have been thumping? couldn't they have been thumping?