English verb conjugation
CAN THUMP

Regular verb: thump - thumped - thumped

Affirmation

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

Negation

Simple form	V-ing form
I can't thump you can't thump he can't thump we can't thump you can't thump they can't thump	I can't be thumping you can't be thumping he can't be thumping we can't be thumping you can't be thumping they can't be thumping
Perfect	V-ing perfect
I can't have thumped you can't have thumped he can't have thumped we can't have thumped you can't have thumped they can't have thumped	I can't have been thumping you can't have been thumping he can't have been thumping we can't have been thumping you can't have been thumping they can't have been thumping

Interrogative form

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

Interro-negative form

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