English verb conjugation
CAN VALIDATE

Regular verb: validate - validated - validated

Affirmation

Simple form	V-ing form
I can validate you can validate he can validate we can validate you can validate they can validate	I can be validating you can be validating he can be validating we can be validating you can be validating they can be validating
Perfect	V-ing perfect
I can have validated you can have validated he can have validated we can have validated you can have validated they can have validated	I can have been validating you can have been validating he can have been validating we can have been validating you can have been validating they can have been validating

Negation

Simple form	V-ing form
I cannot validate you cannot validate he cannot validate we cannot validate you cannot validate they cannot validate	I cannot be validating you cannot be validating he cannot be validating we cannot be validating you cannot be validating they cannot be validating
Perfect	V-ing perfect
I cannot have validated you cannot have validated he cannot have validated we cannot have validated you cannot have validated they cannot have validated	I cannot have been validating you cannot have been validating he cannot have been validating we cannot have been validating you cannot have been validating they cannot have been validating

Interrogative form

Simple form	V-ing form
can I validate? can you validate? can he validate? can we validate? can you validate? can they validate?	can I be validating? can you be validating? can he be validating? can we be validating? can you be validating? can they be validating?
Perfect	V-ing perfect
can I have validated? can you have validated? can he have validated? can we have validated? can you have validated? can they have validated?	can I have been validating? can you have been validating? can he have been validating? can we have been validating? can you have been validating? can they have been validating?

Interro-negative form

Simple form	V-ing form
can I not validate? can you not validate? can he not validate? can we not validate? can you not validate? can they not validate?	can I not be validating? can you not be validating? can he not be validating? can we not be validating? can you not be validating? can they not be validating?
Perfect	V-ing perfect
can I not have validated? can you not have validated? can he not have validated? can we not have validated? can you not have validated? can they not have validated?	can I not have been validating? can you not have been validating? can he not have been validating? can we not have been validating? can you not have been validating? can they not have been validating?