English verb conjugation
CAN EXCUSE

Regular verb: excuse - excused - excused

Affirmation

Simple form	V-ing form
I can excuse you can excuse she can excuse we can excuse you can excuse they can excuse	I can be excusing you can be excusing she can be excusing we can be excusing you can be excusing they can be excusing
Perfect	V-ing perfect
I can have excused you can have excused she can have excused we can have excused you can have excused they can have excused	I can have been excusing you can have been excusing she can have been excusing we can have been excusing you can have been excusing they can have been excusing

Negation

Simple form	V-ing form
I cannot excuse you cannot excuse she cannot excuse we cannot excuse you cannot excuse they cannot excuse	I cannot be excusing you cannot be excusing she cannot be excusing we cannot be excusing you cannot be excusing they cannot be excusing
Perfect	V-ing perfect
I cannot have excused you cannot have excused she cannot have excused we cannot have excused you cannot have excused they cannot have excused	I cannot have been excusing you cannot have been excusing she cannot have been excusing we cannot have been excusing you cannot have been excusing they cannot have been excusing

Interrogative form

Simple form	V-ing form
can I excuse? can you excuse? can she excuse? can we excuse? can you excuse? can they excuse?	can I be excusing? can you be excusing? can she be excusing? can we be excusing? can you be excusing? can they be excusing?
Perfect	V-ing perfect
can I have excused? can you have excused? can she have excused? can we have excused? can you have excused? can they have excused?	can I have been excusing? can you have been excusing? can she have been excusing? can we have been excusing? can you have been excusing? can they have been excusing?

Interro-negative form

Simple form	V-ing form
can I not excuse? can you not excuse? can she not excuse? can we not excuse? can you not excuse? can they not excuse?	can I not be excusing? can you not be excusing? can she not be excusing? can we not be excusing? can you not be excusing? can they not be excusing?
Perfect	V-ing perfect
can I not have excused? can you not have excused? can she not have excused? can we not have excused? can you not have excused? can they not have excused?	can I not have been excusing? can you not have been excusing? can she not have been excusing? can we not have been excusing? can you not have been excusing? can they not have been excusing?