English verb conjugation
CAN OFFER

Regular verb: offer - offered - offered

Affirmation

Simple form	V-ing form
I can offer you can offer he can offer we can offer you can offer they can offer	I can be offering you can be offering he can be offering we can be offering you can be offering they can be offering
Perfect	V-ing perfect
I can have offered you can have offered he can have offered we can have offered you can have offered they can have offered	I can have been offering you can have been offering he can have been offering we can have been offering you can have been offering they can have been offering

Negation

Simple form	V-ing form
I cannot offer you cannot offer he cannot offer we cannot offer you cannot offer they cannot offer	I cannot be offering you cannot be offering he cannot be offering we cannot be offering you cannot be offering they cannot be offering
Perfect	V-ing perfect
I cannot have offered you cannot have offered he cannot have offered we cannot have offered you cannot have offered they cannot have offered	I cannot have been offering you cannot have been offering he cannot have been offering we cannot have been offering you cannot have been offering they cannot have been offering

Interrogative form

Simple form	V-ing form
can I offer? can you offer? can he offer? can we offer? can you offer? can they offer?	can I be offering? can you be offering? can he be offering? can we be offering? can you be offering? can they be offering?
Perfect	V-ing perfect
can I have offered? can you have offered? can he have offered? can we have offered? can you have offered? can they have offered?	can I have been offering? can you have been offering? can he have been offering? can we have been offering? can you have been offering? can they have been offering?

Interro-negative form

Simple form	V-ing form
can I not offer? can you not offer? can he not offer? can we not offer? can you not offer? can they not offer?	can I not be offering? can you not be offering? can he not be offering? can we not be offering? can you not be offering? can they not be offering?
Perfect	V-ing perfect
can I not have offered? can you not have offered? can he not have offered? can we not have offered? can you not have offered? can they not have offered?	can I not have been offering? can you not have been offering? can he not have been offering? can we not have been offering? can you not have been offering? can they not have been offering?