English verb conjugation
COULD THUMP

Regular verb: thump - thumped - thumped

Affirmation

Simple form	V-ing form
I could thump you could thump she could thump we could thump you could thump they could thump	I could be thumping you could be thumping she 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 she 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 she 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 she 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 she 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 she 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 she 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 she thump? could we thump? could you thump? could they thump?	could I be thumping? could you be thumping? could she 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 she 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 she 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 she 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 she 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 she 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 she have been thumping? couldn't we have been thumping? couldn't you have been thumping? couldn't they have been thumping?