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 cannot substitute you cannot substitute she cannot substitute we cannot substitute you cannot substitute they cannot substitute	I cannot be substituting you cannot be substituting she cannot be substituting we cannot be substituting you cannot be substituting they cannot be substituting
Perfect	V-ing perfect
I cannot have substituted you cannot have substituted she cannot have substituted we cannot have substituted you cannot have substituted they cannot have substituted	I cannot have been substituting you cannot have been substituting she cannot have been substituting we cannot have been substituting you cannot have been substituting they cannot 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 I not substitute? can you not substitute? can she not substitute? can we not substitute? can you not substitute? can they not substitute?	can I not be substituting? can you not be substituting? can she not be substituting? can we not be substituting? can you not be substituting? can they not be substituting?
Perfect	V-ing perfect
can I not have substituted? can you not have substituted? can she not have substituted? can we not have substituted? can you not have substituted? can they not have substituted?	can I not have been substituting? can you not have been substituting? can she not have been substituting? can we not have been substituting? can you not have been substituting? can they not have been substituting?