English verb conjugation
CAN AUTHENTICATE

Regular verb: authenticate - authenticated - authenticated

Affirmation

Simple form	V-ing form
I can authenticate you can authenticate she can authenticate we can authenticate you can authenticate they can authenticate	I can be authenticating you can be authenticating she can be authenticating we can be authenticating you can be authenticating they can be authenticating
Perfect	V-ing perfect
I can have authenticated you can have authenticated she can have authenticated we can have authenticated you can have authenticated they can have authenticated	I can have been authenticating you can have been authenticating she can have been authenticating we can have been authenticating you can have been authenticating they can have been authenticating

Negation

Simple form	V-ing form
I cannot authenticate you cannot authenticate she cannot authenticate we cannot authenticate you cannot authenticate they cannot authenticate	I cannot be authenticating you cannot be authenticating she cannot be authenticating we cannot be authenticating you cannot be authenticating they cannot be authenticating
Perfect	V-ing perfect
I cannot have authenticated you cannot have authenticated she cannot have authenticated we cannot have authenticated you cannot have authenticated they cannot have authenticated	I cannot have been authenticating you cannot have been authenticating she cannot have been authenticating we cannot have been authenticating you cannot have been authenticating they cannot have been authenticating

Interrogative form

Simple form	V-ing form
can I authenticate? can you authenticate? can she authenticate? can we authenticate? can you authenticate? can they authenticate?	can I be authenticating? can you be authenticating? can she be authenticating? can we be authenticating? can you be authenticating? can they be authenticating?
Perfect	V-ing perfect
can I have authenticated? can you have authenticated? can she have authenticated? can we have authenticated? can you have authenticated? can they have authenticated?	can I have been authenticating? can you have been authenticating? can she have been authenticating? can we have been authenticating? can you have been authenticating? can they have been authenticating?

Interro-negative form

Simple form	V-ing form
can I not authenticate? can you not authenticate? can she not authenticate? can we not authenticate? can you not authenticate? can they not authenticate?	can I not be authenticating? can you not be authenticating? can she not be authenticating? can we not be authenticating? can you not be authenticating? can they not be authenticating?
Perfect	V-ing perfect
can I not have authenticated? can you not have authenticated? can she not have authenticated? can we not have authenticated? can you not have authenticated? can they not have authenticated?	can I not have been authenticating? can you not have been authenticating? can she not have been authenticating? can we not have been authenticating? can you not have been authenticating? can they not have been authenticating?