English verb conjugation
CAN RUE

Regular verb: rue - rued - rued

Affirmation

Simple form	V-ing form
I can rue you can rue he can rue we can rue you can rue they can rue	I can be ruing you can be ruing he can be ruing we can be ruing you can be ruing they can be ruing
Perfect	V-ing perfect
I can have rued you can have rued he can have rued we can have rued you can have rued they can have rued	I can have been ruing you can have been ruing he can have been ruing we can have been ruing you can have been ruing they can have been ruing

Negation

Simple form	V-ing form
I can't rue you can't rue he can't rue we can't rue you can't rue they can't rue	I can't be ruing you can't be ruing he can't be ruing we can't be ruing you can't be ruing they can't be ruing
Perfect	V-ing perfect
I can't have rued you can't have rued he can't have rued we can't have rued you can't have rued they can't have rued	I can't have been ruing you can't have been ruing he can't have been ruing we can't have been ruing you can't have been ruing they can't have been ruing

Interrogative form

Simple form	V-ing form
can I rue? can you rue? can he rue? can we rue? can you rue? can they rue?	can I be ruing? can you be ruing? can he be ruing? can we be ruing? can you be ruing? can they be ruing?
Perfect	V-ing perfect
can I have rued? can you have rued? can he have rued? can we have rued? can you have rued? can they have rued?	can I have been ruing? can you have been ruing? can he have been ruing? can we have been ruing? can you have been ruing? can they have been ruing?

Interro-negative form

Simple form	V-ing form
can't I rue? can't you rue? can't he rue? can't we rue? can't you rue? can't they rue?	can't I be ruing? can't you be ruing? can't he be ruing? can't we be ruing? can't you be ruing? can't they be ruing?
Perfect	V-ing perfect
can't I have rued? can't you have rued? can't he have rued? can't we have rued? can't you have rued? can't they have rued?	can't I have been ruing? can't you have been ruing? can't he have been ruing? can't we have been ruing? can't you have been ruing? can't they have been ruing?