English verb conjugation
CAN DECIDE

Regular verb: decide - decided - decided

Affirmation

Simple form	V-ing form
I can decide you can decide he can decide we can decide you can decide they can decide	I can be deciding you can be deciding he can be deciding we can be deciding you can be deciding they can be deciding
Perfect	V-ing perfect
I can have decided you can have decided he can have decided we can have decided you can have decided they can have decided	I can have been deciding you can have been deciding he can have been deciding we can have been deciding you can have been deciding they can have been deciding

Negation

Simple form	V-ing form
I can't decide you can't decide he can't decide we can't decide you can't decide they can't decide	I can't be deciding you can't be deciding he can't be deciding we can't be deciding you can't be deciding they can't be deciding
Perfect	V-ing perfect
I can't have decided you can't have decided he can't have decided we can't have decided you can't have decided they can't have decided	I can't have been deciding you can't have been deciding he can't have been deciding we can't have been deciding you can't have been deciding they can't have been deciding

Interrogative form

Simple form	V-ing form
can I decide? can you decide? can he decide? can we decide? can you decide? can they decide?	can I be deciding? can you be deciding? can he be deciding? can we be deciding? can you be deciding? can they be deciding?
Perfect	V-ing perfect
can I have decided? can you have decided? can he have decided? can we have decided? can you have decided? can they have decided?	can I have been deciding? can you have been deciding? can he have been deciding? can we have been deciding? can you have been deciding? can they have been deciding?

Interro-negative form

Simple form	V-ing form
can't I decide? can't you decide? can't he decide? can't we decide? can't you decide? can't they decide?	can't I be deciding? can't you be deciding? can't he be deciding? can't we be deciding? can't you be deciding? can't they be deciding?
Perfect	V-ing perfect
can't I have decided? can't you have decided? can't he have decided? can't we have decided? can't you have decided? can't they have decided?	can't I have been deciding? can't you have been deciding? can't he have been deciding? can't we have been deciding? can't you have been deciding? can't they have been deciding?