English verb conjugation
CAN SUE

Regular verb: sue - sued - sued

Affirmation

Simple form	V-ing form
I can sue you can sue he can sue we can sue you can sue they can sue	I can be suing you can be suing he can be suing we can be suing you can be suing they can be suing
Perfect	V-ing perfect
I can have sued you can have sued he can have sued we can have sued you can have sued they can have sued	I can have been suing you can have been suing he can have been suing we can have been suing you can have been suing they can have been suing

Negation

Simple form	V-ing form
I can't sue you can't sue he can't sue we can't sue you can't sue they can't sue	I can't be suing you can't be suing he can't be suing we can't be suing you can't be suing they can't be suing
Perfect	V-ing perfect
I can't have sued you can't have sued he can't have sued we can't have sued you can't have sued they can't have sued	I can't have been suing you can't have been suing he can't have been suing we can't have been suing you can't have been suing they can't have been suing

Interrogative form

Simple form	V-ing form
can I sue? can you sue? can he sue? can we sue? can you sue? can they sue?	can I be suing? can you be suing? can he be suing? can we be suing? can you be suing? can they be suing?
Perfect	V-ing perfect
can I have sued? can you have sued? can he have sued? can we have sued? can you have sued? can they have sued?	can I have been suing? can you have been suing? can he have been suing? can we have been suing? can you have been suing? can they have been suing?

Interro-negative form

Simple form	V-ing form
can't I sue? can't you sue? can't he sue? can't we sue? can't you sue? can't they sue?	can't I be suing? can't you be suing? can't he be suing? can't we be suing? can't you be suing? can't they be suing?
Perfect	V-ing perfect
can't I have sued? can't you have sued? can't he have sued? can't we have sued? can't you have sued? can't they have sued?	can't I have been suing? can't you have been suing? can't he have been suing? can't we have been suing? can't you have been suing? can't they have been suing?