English verb conjugation
CAN DECIDE

Regular verb: decide - decided - decided

Affirmation

Simple form	V-ing form
I can decide you can decide she can decide we can decide you can decide they can decide	I can be deciding you can be deciding she 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 she 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 she 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 cannot decide you cannot decide she cannot decide we cannot decide you cannot decide they cannot decide	I cannot be deciding you cannot be deciding she cannot be deciding we cannot be deciding you cannot be deciding they cannot be deciding
Perfect	V-ing perfect
I cannot have decided you cannot have decided she cannot have decided we cannot have decided you cannot have decided they cannot have decided	I cannot have been deciding you cannot have been deciding she cannot have been deciding we cannot have been deciding you cannot have been deciding they cannot have been deciding

Interrogative form

Simple form	V-ing form
can I decide? can you decide? can she decide? can we decide? can you decide? can they decide?	can I be deciding? can you be deciding? can she 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 she 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 she 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 I not decide? can you not decide? can she not decide? can we not decide? can you not decide? can they not decide?	can I not be deciding? can you not be deciding? can she not be deciding? can we not be deciding? can you not be deciding? can they not be deciding?
Perfect	V-ing perfect
can I not have decided? can you not have decided? can she not have decided? can we not have decided? can you not have decided? can they not have decided?	can I not have been deciding? can you not have been deciding? can she not have been deciding? can we not have been deciding? can you not have been deciding? can they not have been deciding?