English verb conjugation
CAN PRESTAMP

Regular verb: prestamp - prestamped - prestamped

Affirmation

Simple form	V-ing form
I can prestamp you can prestamp he can prestamp we can prestamp you can prestamp they can prestamp	I can be prestamping you can be prestamping he can be prestamping we can be prestamping you can be prestamping they can be prestamping
Perfect	V-ing perfect
I can have prestamped you can have prestamped he can have prestamped we can have prestamped you can have prestamped they can have prestamped	I can have been prestamping you can have been prestamping he can have been prestamping we can have been prestamping you can have been prestamping they can have been prestamping

Negation

Simple form	V-ing form
I cannot prestamp you cannot prestamp he cannot prestamp we cannot prestamp you cannot prestamp they cannot prestamp	I cannot be prestamping you cannot be prestamping he cannot be prestamping we cannot be prestamping you cannot be prestamping they cannot be prestamping
Perfect	V-ing perfect
I cannot have prestamped you cannot have prestamped he cannot have prestamped we cannot have prestamped you cannot have prestamped they cannot have prestamped	I cannot have been prestamping you cannot have been prestamping he cannot have been prestamping we cannot have been prestamping you cannot have been prestamping they cannot have been prestamping

Interrogative form

Simple form	V-ing form
can I prestamp? can you prestamp? can he prestamp? can we prestamp? can you prestamp? can they prestamp?	can I be prestamping? can you be prestamping? can he be prestamping? can we be prestamping? can you be prestamping? can they be prestamping?
Perfect	V-ing perfect
can I have prestamped? can you have prestamped? can he have prestamped? can we have prestamped? can you have prestamped? can they have prestamped?	can I have been prestamping? can you have been prestamping? can he have been prestamping? can we have been prestamping? can you have been prestamping? can they have been prestamping?

Interro-negative form

Simple form	V-ing form
can I not prestamp? can you not prestamp? can he not prestamp? can we not prestamp? can you not prestamp? can they not prestamp?	can I not be prestamping? can you not be prestamping? can he not be prestamping? can we not be prestamping? can you not be prestamping? can they not be prestamping?
Perfect	V-ing perfect
can I not have prestamped? can you not have prestamped? can he not have prestamped? can we not have prestamped? can you not have prestamped? can they not have prestamped?	can I not have been prestamping? can you not have been prestamping? can he not have been prestamping? can we not have been prestamping? can you not have been prestamping? can they not have been prestamping?