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 can't excuse you can't excuse she can't excuse we can't excuse you can't excuse they can't excuse	I can't be excusing you can't be excusing she can't be excusing we can't be excusing you can't be excusing they can't be excusing
Perfect	V-ing perfect
I can't have excused you can't have excused she can't have excused we can't have excused you can't have excused they can't have excused	I can't have been excusing you can't have been excusing she can't have been excusing we can't have been excusing you can't have been excusing they can't 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't I excuse? can't you excuse? can't she excuse? can't we excuse? can't you excuse? can't they excuse?	can't I be excusing? can't you be excusing? can't she be excusing? can't we be excusing? can't you be excusing? can't they be excusing?
Perfect	V-ing perfect
can't I have excused? can't you have excused? can't she have excused? can't we have excused? can't you have excused? can't they have excused?	can't I have been excusing? can't you have been excusing? can't she have been excusing? can't we have been excusing? can't you have been excusing? can't they have been excusing?