English verb conjugation
CAN PUMP

Regular verb: pump - pumped - pumped

Affirmation

Simple form	V-ing form
I can pump you can pump he can pump we can pump you can pump they can pump	I can be pumping you can be pumping he can be pumping we can be pumping you can be pumping they can be pumping
Perfect	V-ing perfect
I can have pumped you can have pumped he can have pumped we can have pumped you can have pumped they can have pumped	I can have been pumping you can have been pumping he can have been pumping we can have been pumping you can have been pumping they can have been pumping

Negation

Simple form	V-ing form
I can't pump you can't pump he can't pump we can't pump you can't pump they can't pump	I can't be pumping you can't be pumping he can't be pumping we can't be pumping you can't be pumping they can't be pumping
Perfect	V-ing perfect
I can't have pumped you can't have pumped he can't have pumped we can't have pumped you can't have pumped they can't have pumped	I can't have been pumping you can't have been pumping he can't have been pumping we can't have been pumping you can't have been pumping they can't have been pumping

Interrogative form

Simple form	V-ing form
can I pump? can you pump? can he pump? can we pump? can you pump? can they pump?	can I be pumping? can you be pumping? can he be pumping? can we be pumping? can you be pumping? can they be pumping?
Perfect	V-ing perfect
can I have pumped? can you have pumped? can he have pumped? can we have pumped? can you have pumped? can they have pumped?	can I have been pumping? can you have been pumping? can he have been pumping? can we have been pumping? can you have been pumping? can they have been pumping?

Interro-negative form

Simple form	V-ing form
can't I pump? can't you pump? can't he pump? can't we pump? can't you pump? can't they pump?	can't I be pumping? can't you be pumping? can't he be pumping? can't we be pumping? can't you be pumping? can't they be pumping?
Perfect	V-ing perfect
can't I have pumped? can't you have pumped? can't he have pumped? can't we have pumped? can't you have pumped? can't they have pumped?	can't I have been pumping? can't you have been pumping? can't he have been pumping? can't we have been pumping? can't you have been pumping? can't they have been pumping?