English verb conjugation
CAN VERIFY

Regular verb: verify - verified - verified

Affirmation

Simple form	V-ing form
I can verify you can verify he can verify we can verify you can verify they can verify	I can be verifying you can be verifying he can be verifying we can be verifying you can be verifying they can be verifying
Perfect	V-ing perfect
I can have verified you can have verified he can have verified we can have verified you can have verified they can have verified	I can have been verifying you can have been verifying he can have been verifying we can have been verifying you can have been verifying they can have been verifying

Negation

Simple form	V-ing form
I cannot verify you cannot verify he cannot verify we cannot verify you cannot verify they cannot verify	I cannot be verifying you cannot be verifying he cannot be verifying we cannot be verifying you cannot be verifying they cannot be verifying
Perfect	V-ing perfect
I cannot have verified you cannot have verified he cannot have verified we cannot have verified you cannot have verified they cannot have verified	I cannot have been verifying you cannot have been verifying he cannot have been verifying we cannot have been verifying you cannot have been verifying they cannot have been verifying

Interrogative form

Simple form	V-ing form
can I verify? can you verify? can he verify? can we verify? can you verify? can they verify?	can I be verifying? can you be verifying? can he be verifying? can we be verifying? can you be verifying? can they be verifying?
Perfect	V-ing perfect
can I have verified? can you have verified? can he have verified? can we have verified? can you have verified? can they have verified?	can I have been verifying? can you have been verifying? can he have been verifying? can we have been verifying? can you have been verifying? can they have been verifying?

Interro-negative form

Simple form	V-ing form
can I not verify? can you not verify? can he not verify? can we not verify? can you not verify? can they not verify?	can I not be verifying? can you not be verifying? can he not be verifying? can we not be verifying? can you not be verifying? can they not be verifying?
Perfect	V-ing perfect
can I not have verified? can you not have verified? can he not have verified? can we not have verified? can you not have verified? can they not have verified?	can I not have been verifying? can you not have been verifying? can he not have been verifying? can we not have been verifying? can you not have been verifying? can they not have been verifying?