I can fantasize you can fantasize she can fantasize we can fantasize you can fantasize they can fantasize
V-ing form
I can be fantasizing you can be fantasizing she can be fantasizing we can be fantasizing you can be fantasizing they can be fantasizing
Perfect
I can have fantasized you can have fantasized she can have fantasized we can have fantasized you can have fantasized they can have fantasized
V-ing perfect
I can have been fantasizing you can have been fantasizing she can have been fantasizing we can have been fantasizing you can have been fantasizing they can have been fantasizing
Negation
Simple form
I cannot fantasize you cannot fantasize she cannot fantasize we cannot fantasize you cannot fantasize they cannot fantasize
V-ing form
I cannot be fantasizing you cannot be fantasizing she cannot be fantasizing we cannot be fantasizing you cannot be fantasizing they cannot be fantasizing
Perfect
I cannot have fantasized you cannot have fantasized she cannot have fantasized we cannot have fantasized you cannot have fantasized they cannot have fantasized
V-ing perfect
I cannot have been fantasizing you cannot have been fantasizing she cannot have been fantasizing we cannot have been fantasizing you cannot have been fantasizing they cannot have been fantasizing
Interrogative form
Simple form
can I fantasize? can you fantasize? can she fantasize? can we fantasize? can you fantasize? can they fantasize?
V-ing form
can I be fantasizing? can you be fantasizing? can she be fantasizing? can we be fantasizing? can you be fantasizing? can they be fantasizing?
Perfect
can I have fantasized? can you have fantasized? can she have fantasized? can we have fantasized? can you have fantasized? can they have fantasized?
V-ing perfect
can I have been fantasizing? can you have been fantasizing? can she have been fantasizing? can we have been fantasizing? can you have been fantasizing? can they have been fantasizing?
Interro-negative form
Simple form
can I not fantasize? can you not fantasize? can she not fantasize? can we not fantasize? can you not fantasize? can they not fantasize?
V-ing form
can I not be fantasizing? can you not be fantasizing? can she not be fantasizing? can we not be fantasizing? can you not be fantasizing? can they not be fantasizing?
Perfect
can I not have fantasized? can you not have fantasized? can she not have fantasized? can we not have fantasized? can you not have fantasized? can they not have fantasized?
V-ing perfect
can I not have been fantasizing? can you not have been fantasizing? can she not have been fantasizing? can we not have been fantasizing? can you not have been fantasizing? can they not have been fantasizing?