I can recognize you can recognize he can recognize we can recognize you can recognize they can recognize
V-ing form
I can be recognizing you can be recognizing he can be recognizing we can be recognizing you can be recognizing they can be recognizing
Perfect
I can have recognized you can have recognized he can have recognized we can have recognized you can have recognized they can have recognized
V-ing perfect
I can have been recognizing you can have been recognizing he can have been recognizing we can have been recognizing you can have been recognizing they can have been recognizing
Negation
Simple form
I cannot recognize you cannot recognize he cannot recognize we cannot recognize you cannot recognize they cannot recognize
V-ing form
I cannot be recognizing you cannot be recognizing he cannot be recognizing we cannot be recognizing you cannot be recognizing they cannot be recognizing
Perfect
I cannot have recognized you cannot have recognized he cannot have recognized we cannot have recognized you cannot have recognized they cannot have recognized
V-ing perfect
I cannot have been recognizing you cannot have been recognizing he cannot have been recognizing we cannot have been recognizing you cannot have been recognizing they cannot have been recognizing
Interrogative form
Simple form
can I recognize? can you recognize? can he recognize? can we recognize? can you recognize? can they recognize?
V-ing form
can I be recognizing? can you be recognizing? can he be recognizing? can we be recognizing? can you be recognizing? can they be recognizing?
Perfect
can I have recognized? can you have recognized? can he have recognized? can we have recognized? can you have recognized? can they have recognized?
V-ing perfect
can I have been recognizing? can you have been recognizing? can he have been recognizing? can we have been recognizing? can you have been recognizing? can they have been recognizing?
Interro-negative form
Simple form
can I not recognize? can you not recognize? can he not recognize? can we not recognize? can you not recognize? can they not recognize?
V-ing form
can I not be recognizing? can you not be recognizing? can he not be recognizing? can we not be recognizing? can you not be recognizing? can they not be recognizing?
Perfect
can I not have recognized? can you not have recognized? can he not have recognized? can we not have recognized? can you not have recognized? can they not have recognized?
V-ing perfect
can I not have been recognizing? can you not have been recognizing? can he not have been recognizing? can we not have been recognizing? can you not have been recognizing? can they not have been recognizing?