English verb conjugation
CAN INVALID

Regular verb: invalid - invalided - invalided

Affirmation

Simple form	V-ing form
I can invalid you can invalid he can invalid we can invalid you can invalid they can invalid	I can be invaliding you can be invaliding he can be invaliding we can be invaliding you can be invaliding they can be invaliding
Perfect	V-ing perfect
I can have invalided you can have invalided he can have invalided we can have invalided you can have invalided they can have invalided	I can have been invaliding you can have been invaliding he can have been invaliding we can have been invaliding you can have been invaliding they can have been invaliding

Negation

Simple form	V-ing form
I can't invalid you can't invalid he can't invalid we can't invalid you can't invalid they can't invalid	I can't be invaliding you can't be invaliding he can't be invaliding we can't be invaliding you can't be invaliding they can't be invaliding
Perfect	V-ing perfect
I can't have invalided you can't have invalided he can't have invalided we can't have invalided you can't have invalided they can't have invalided	I can't have been invaliding you can't have been invaliding he can't have been invaliding we can't have been invaliding you can't have been invaliding they can't have been invaliding

Interrogative form

Simple form	V-ing form
can I invalid? can you invalid? can he invalid? can we invalid? can you invalid? can they invalid?	can I be invaliding? can you be invaliding? can he be invaliding? can we be invaliding? can you be invaliding? can they be invaliding?
Perfect	V-ing perfect
can I have invalided? can you have invalided? can he have invalided? can we have invalided? can you have invalided? can they have invalided?	can I have been invaliding? can you have been invaliding? can he have been invaliding? can we have been invaliding? can you have been invaliding? can they have been invaliding?

Interro-negative form

Simple form	V-ing form
can't I invalid? can't you invalid? can't he invalid? can't we invalid? can't you invalid? can't they invalid?	can't I be invaliding? can't you be invaliding? can't he be invaliding? can't we be invaliding? can't you be invaliding? can't they be invaliding?
Perfect	V-ing perfect
can't I have invalided? can't you have invalided? can't he have invalided? can't we have invalided? can't you have invalided? can't they have invalided?	can't I have been invaliding? can't you have been invaliding? can't he have been invaliding? can't we have been invaliding? can't you have been invaliding? can't they have been invaliding?