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 can't authenticate you can't authenticate she can't authenticate we can't authenticate you can't authenticate they can't authenticate	I can't be authenticating you can't be authenticating she can't be authenticating we can't be authenticating you can't be authenticating they can't be authenticating
Perfect	V-ing perfect
I can't have authenticated you can't have authenticated she can't have authenticated we can't have authenticated you can't have authenticated they can't have authenticated	I can't have been authenticating you can't have been authenticating she can't have been authenticating we can't have been authenticating you can't have been authenticating they can't 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't I authenticate? can't you authenticate? can't she authenticate? can't we authenticate? can't you authenticate? can't they authenticate?	can't I be authenticating? can't you be authenticating? can't she be authenticating? can't we be authenticating? can't you be authenticating? can't they be authenticating?
Perfect	V-ing perfect
can't I have authenticated? can't you have authenticated? can't she have authenticated? can't we have authenticated? can't you have authenticated? can't they have authenticated?	can't I have been authenticating? can't you have been authenticating? can't she have been authenticating? can't we have been authenticating? can't you have been authenticating? can't they have been authenticating?