I can concertize you can concertize she can concertize we can concertize you can concertize they can concertize
V-ing form
I can be concertizing you can be concertizing she can be concertizing we can be concertizing you can be concertizing they can be concertizing
Perfect
I can have concertized you can have concertized she can have concertized we can have concertized you can have concertized they can have concertized
V-ing perfect
I can have been concertizing you can have been concertizing she can have been concertizing we can have been concertizing you can have been concertizing they can have been concertizing
Negation
Simple form
I cannot concertize you cannot concertize she cannot concertize we cannot concertize you cannot concertize they cannot concertize
V-ing form
I cannot be concertizing you cannot be concertizing she cannot be concertizing we cannot be concertizing you cannot be concertizing they cannot be concertizing
Perfect
I cannot have concertized you cannot have concertized she cannot have concertized we cannot have concertized you cannot have concertized they cannot have concertized
V-ing perfect
I cannot have been concertizing you cannot have been concertizing she cannot have been concertizing we cannot have been concertizing you cannot have been concertizing they cannot have been concertizing
Interrogative form
Simple form
can I concertize? can you concertize? can she concertize? can we concertize? can you concertize? can they concertize?
V-ing form
can I be concertizing? can you be concertizing? can she be concertizing? can we be concertizing? can you be concertizing? can they be concertizing?
Perfect
can I have concertized? can you have concertized? can she have concertized? can we have concertized? can you have concertized? can they have concertized?
V-ing perfect
can I have been concertizing? can you have been concertizing? can she have been concertizing? can we have been concertizing? can you have been concertizing? can they have been concertizing?
Interro-negative form
Simple form
can I not concertize? can you not concertize? can she not concertize? can we not concertize? can you not concertize? can they not concertize?
V-ing form
can I not be concertizing? can you not be concertizing? can she not be concertizing? can we not be concertizing? can you not be concertizing? can they not be concertizing?
Perfect
can I not have concertized? can you not have concertized? can she not have concertized? can we not have concertized? can you not have concertized? can they not have concertized?
V-ing perfect
can I not have been concertizing? can you not have been concertizing? can she not have been concertizing? can we not have been concertizing? can you not have been concertizing? can they not have been concertizing?