English verb conjugation
CAN EXCEL

Regular verb: excel - excelled - excelled

Affirmation

Simple form	V-ing form
I can excel you can excel he can excel we can excel you can excel they can excel	I can be excelling you can be excelling he can be excelling we can be excelling you can be excelling they can be excelling
Perfect	V-ing perfect
I can have excelled you can have excelled he can have excelled we can have excelled you can have excelled they can have excelled	I can have been excelling you can have been excelling he can have been excelling we can have been excelling you can have been excelling they can have been excelling

Negation

Simple form	V-ing form
I cannot excel you cannot excel he cannot excel we cannot excel you cannot excel they cannot excel	I cannot be excelling you cannot be excelling he cannot be excelling we cannot be excelling you cannot be excelling they cannot be excelling
Perfect	V-ing perfect
I cannot have excelled you cannot have excelled he cannot have excelled we cannot have excelled you cannot have excelled they cannot have excelled	I cannot have been excelling you cannot have been excelling he cannot have been excelling we cannot have been excelling you cannot have been excelling they cannot have been excelling

Interrogative form

Simple form	V-ing form
can I excel? can you excel? can he excel? can we excel? can you excel? can they excel?	can I be excelling? can you be excelling? can he be excelling? can we be excelling? can you be excelling? can they be excelling?
Perfect	V-ing perfect
can I have excelled? can you have excelled? can he have excelled? can we have excelled? can you have excelled? can they have excelled?	can I have been excelling? can you have been excelling? can he have been excelling? can we have been excelling? can you have been excelling? can they have been excelling?

Interro-negative form

Simple form	V-ing form
can I not excel? can you not excel? can he not excel? can we not excel? can you not excel? can they not excel?	can I not be excelling? can you not be excelling? can he not be excelling? can we not be excelling? can you not be excelling? can they not be excelling?
Perfect	V-ing perfect
can I not have excelled? can you not have excelled? can he not have excelled? can we not have excelled? can you not have excelled? can they not have excelled?	can I not have been excelling? can you not have been excelling? can he not have been excelling? can we not have been excelling? can you not have been excelling? can they not have been excelling?