I can specify you can specify she can specify we can specify you can specify they can specify
V-ing form
I can be specifying you can be specifying she can be specifying we can be specifying you can be specifying they can be specifying
Perfect
I can have specified you can have specified she can have specified we can have specified you can have specified they can have specified
V-ing perfect
I can have been specifying you can have been specifying she can have been specifying we can have been specifying you can have been specifying they can have been specifying
Negation
Simple form
I cannot specify you cannot specify she cannot specify we cannot specify you cannot specify they cannot specify
V-ing form
I cannot be specifying you cannot be specifying she cannot be specifying we cannot be specifying you cannot be specifying they cannot be specifying
Perfect
I cannot have specified you cannot have specified she cannot have specified we cannot have specified you cannot have specified they cannot have specified
V-ing perfect
I cannot have been specifying you cannot have been specifying she cannot have been specifying we cannot have been specifying you cannot have been specifying they cannot have been specifying
Interrogative form
Simple form
can I specify? can you specify? can she specify? can we specify? can you specify? can they specify?
V-ing form
can I be specifying? can you be specifying? can she be specifying? can we be specifying? can you be specifying? can they be specifying?
Perfect
can I have specified? can you have specified? can she have specified? can we have specified? can you have specified? can they have specified?
V-ing perfect
can I have been specifying? can you have been specifying? can she have been specifying? can we have been specifying? can you have been specifying? can they have been specifying?
Interro-negative form
Simple form
can I not specify? can you not specify? can she not specify? can we not specify? can you not specify? can they not specify?
V-ing form
can I not be specifying? can you not be specifying? can she not be specifying? can we not be specifying? can you not be specifying? can they not be specifying?
Perfect
can I not have specified? can you not have specified? can she not have specified? can we not have specified? can you not have specified? can they not have specified?
V-ing perfect
can I not have been specifying? can you not have been specifying? can she not have been specifying? can we not have been specifying? can you not have been specifying? can they not have been specifying?