English verb conjugation
CAN SPECIFY

Regular verb: specify - specified - specified

Affirmation

Simple form	V-ing form
I can specify you can specify he can specify we can specify you can specify they can specify	I can be specifying you can be specifying he can be specifying we can be specifying you can be specifying they can be specifying
Perfect	V-ing perfect
I can have specified you can have specified he can have specified we can have specified you can have specified they can have specified	I can have been specifying you can have been specifying he can have been specifying we can have been specifying you can have been specifying they can have been specifying

Negation

Simple form	V-ing form
I can't specify you can't specify he can't specify we can't specify you can't specify they can't specify	I can't be specifying you can't be specifying he can't be specifying we can't be specifying you can't be specifying they can't be specifying
Perfect	V-ing perfect
I can't have specified you can't have specified he can't have specified we can't have specified you can't have specified they can't have specified	I can't have been specifying you can't have been specifying he can't have been specifying we can't have been specifying you can't have been specifying they can't have been specifying

Interrogative form

Simple form	V-ing form
can I specify? can you specify? can he specify? can we specify? can you specify? can they specify?	can I be specifying? can you be specifying? can he be specifying? can we be specifying? can you be specifying? can they be specifying?
Perfect	V-ing perfect
can I have specified? can you have specified? can he have specified? can we have specified? can you have specified? can they have specified?	can I have been specifying? can you have been specifying? can he have been specifying? can we have been specifying? can you have been specifying? can they have been specifying?

Interro-negative form

Simple form	V-ing form
can't I specify? can't you specify? can't he specify? can't we specify? can't you specify? can't they specify?	can't I be specifying? can't you be specifying? can't he be specifying? can't we be specifying? can't you be specifying? can't they be specifying?
Perfect	V-ing perfect
can't I have specified? can't you have specified? can't he have specified? can't we have specified? can't you have specified? can't they have specified?	can't I have been specifying? can't you have been specifying? can't he have been specifying? can't we have been specifying? can't you have been specifying? can't they have been specifying?