Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can offer sth you can offer sth he can offer sth we can offer sth you can offer sth they can offer sth
V-ing form
I can be offer sthing you can be offer sthing he can be offer sthing we can be offer sthing you can be offer sthing they can be offer sthing
Perfect
I can have offer sthed you can have offer sthed he can have offer sthed we can have offer sthed you can have offer sthed they can have offer sthed
V-ing perfect
I can have been offer sthing you can have been offer sthing he can have been offer sthing we can have been offer sthing you can have been offer sthing they can have been offer sthing
Negation
Simple form
I cannot offer sth you cannot offer sth he cannot offer sth we cannot offer sth you cannot offer sth they cannot offer sth
V-ing form
I cannot be offer sthing you cannot be offer sthing he cannot be offer sthing we cannot be offer sthing you cannot be offer sthing they cannot be offer sthing
Perfect
I cannot have offer sthed you cannot have offer sthed he cannot have offer sthed we cannot have offer sthed you cannot have offer sthed they cannot have offer sthed
V-ing perfect
I cannot have been offer sthing you cannot have been offer sthing he cannot have been offer sthing we cannot have been offer sthing you cannot have been offer sthing they cannot have been offer sthing
Interrogative form
Simple form
can I offer sth? can you offer sth? can he offer sth? can we offer sth? can you offer sth? can they offer sth?
V-ing form
can I be offer sthing? can you be offer sthing? can he be offer sthing? can we be offer sthing? can you be offer sthing? can they be offer sthing?
Perfect
can I have offer sthed? can you have offer sthed? can he have offer sthed? can we have offer sthed? can you have offer sthed? can they have offer sthed?
V-ing perfect
can I have been offer sthing? can you have been offer sthing? can he have been offer sthing? can we have been offer sthing? can you have been offer sthing? can they have been offer sthing?
Interro-negative form
Simple form
can I not offer sth? can you not offer sth? can he not offer sth? can we not offer sth? can you not offer sth? can they not offer sth?
V-ing form
can I not be offer sthing? can you not be offer sthing? can he not be offer sthing? can we not be offer sthing? can you not be offer sthing? can they not be offer sthing?
Perfect
can I not have offer sthed? can you not have offer sthed? can he not have offer sthed? can we not have offer sthed? can you not have offer sthed? can they not have offer sthed?
V-ing perfect
can I not have been offer sthing? can you not have been offer sthing? can he not have been offer sthing? can we not have been offer sthing? can you not have been offer sthing? can they not have been offer sthing?