Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could excite excite you could excite excite she could excite excite we could excite excite you could excite excite they could excite excite
V-ing form
I could be excite exciting you could be excite exciting she could be excite exciting we could be excite exciting you could be excite exciting they could be excite exciting
Perfect
I could have excite excited you could have excite excited she could have excite excited we could have excite excited you could have excite excited they could have excite excited
V-ing perfect
I could have been excite exciting you could have been excite exciting she could have been excite exciting we could have been excite exciting you could have been excite exciting they could have been excite exciting
Negation
Simple form
I couldn't excite excite you couldn't excite excite she couldn't excite excite we couldn't excite excite you couldn't excite excite they couldn't excite excite
V-ing form
I couldn't be excite exciting you couldn't be excite exciting she couldn't be excite exciting we couldn't be excite exciting you couldn't be excite exciting they couldn't be excite exciting
Perfect
I couldn't have excite excited you couldn't have excite excited she couldn't have excite excited we couldn't have excite excited you couldn't have excite excited they couldn't have excite excited
V-ing perfect
I couldn't have been excite exciting you couldn't have been excite exciting she couldn't have been excite exciting we couldn't have been excite exciting you couldn't have been excite exciting they couldn't have been excite exciting
Interrogative form
Simple form
could I excite excite? could you excite excite? could she excite excite? could we excite excite? could you excite excite? could they excite excite?
V-ing form
could I be excite exciting? could you be excite exciting? could she be excite exciting? could we be excite exciting? could you be excite exciting? could they be excite exciting?
Perfect
could I have excite excited? could you have excite excited? could she have excite excited? could we have excite excited? could you have excite excited? could they have excite excited?
V-ing perfect
could I have been excite exciting? could you have been excite exciting? could she have been excite exciting? could we have been excite exciting? could you have been excite exciting? could they have been excite exciting?
Interro-negative form
Simple form
couldn't I excite excite? couldn't you excite excite? couldn't she excite excite? couldn't we excite excite? couldn't you excite excite? couldn't they excite excite?
V-ing form
couldn't I be excite exciting? couldn't you be excite exciting? couldn't she be excite exciting? couldn't we be excite exciting? couldn't you be excite exciting? couldn't they be excite exciting?
Perfect
couldn't I have excite excited? couldn't you have excite excited? couldn't she have excite excited? couldn't we have excite excited? couldn't you have excite excited? couldn't they have excite excited?
V-ing perfect
couldn't I have been excite exciting? couldn't you have been excite exciting? couldn't she have been excite exciting? couldn't we have been excite exciting? couldn't you have been excite exciting? couldn't they have been excite exciting?