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