English verb conjugation
CAN SUBSTITUTE

Regular verb: substitute - substituted - substituted

Affirmation

Simple form	V-ing form
I can substitute you can substitute she can substitute we can substitute you can substitute they can substitute	I can be substituting you can be substituting she can be substituting we can be substituting you can be substituting they can be substituting
Perfect	V-ing perfect
I can have substituted you can have substituted she can have substituted we can have substituted you can have substituted they can have substituted	I can have been substituting you can have been substituting she can have been substituting we can have been substituting you can have been substituting they can have been substituting

Negation

Simple form	V-ing form
I can't substitute you can't substitute she can't substitute we can't substitute you can't substitute they can't substitute	I can't be substituting you can't be substituting she can't be substituting we can't be substituting you can't be substituting they can't be substituting
Perfect	V-ing perfect
I can't have substituted you can't have substituted she can't have substituted we can't have substituted you can't have substituted they can't have substituted	I can't have been substituting you can't have been substituting she can't have been substituting we can't have been substituting you can't have been substituting they can't have been substituting

Interrogative form

Simple form	V-ing form
can I substitute? can you substitute? can she substitute? can we substitute? can you substitute? can they substitute?	can I be substituting? can you be substituting? can she be substituting? can we be substituting? can you be substituting? can they be substituting?
Perfect	V-ing perfect
can I have substituted? can you have substituted? can she have substituted? can we have substituted? can you have substituted? can they have substituted?	can I have been substituting? can you have been substituting? can she have been substituting? can we have been substituting? can you have been substituting? can they have been substituting?

Interro-negative form

Simple form	V-ing form
can't I substitute? can't you substitute? can't she substitute? can't we substitute? can't you substitute? can't they substitute?	can't I be substituting? can't you be substituting? can't she be substituting? can't we be substituting? can't you be substituting? can't they be substituting?
Perfect	V-ing perfect
can't I have substituted? can't you have substituted? can't she have substituted? can't we have substituted? can't you have substituted? can't they have substituted?	can't I have been substituting? can't you have been substituting? can't she have been substituting? can't we have been substituting? can't you have been substituting? can't they have been substituting?