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 cannot thump you cannot thump he cannot thump we cannot thump you cannot thump they cannot thump	I cannot be thumping you cannot be thumping he cannot be thumping we cannot be thumping you cannot be thumping they cannot be thumping
Perfect	V-ing perfect
I cannot have thumped you cannot have thumped he cannot have thumped we cannot have thumped you cannot have thumped they cannot have thumped	I cannot have been thumping you cannot have been thumping he cannot have been thumping we cannot have been thumping you cannot have been thumping they cannot 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 I not thump? can you not thump? can he not thump? can we not thump? can you not thump? can they not thump?	can I not be thumping? can you not be thumping? can he not be thumping? can we not be thumping? can you not be thumping? can they not be thumping?
Perfect	V-ing perfect
can I not have thumped? can you not have thumped? can he not have thumped? can we not have thumped? can you not have thumped? can they not have thumped?	can I not have been thumping? can you not have been thumping? can he not have been thumping? can we not have been thumping? can you not have been thumping? can they not have been thumping?