I can crystallize you can crystallize he can crystallize we can crystallize you can crystallize they can crystallize
V-ing form
I can be crystallizing you can be crystallizing he can be crystallizing we can be crystallizing you can be crystallizing they can be crystallizing
Perfect
I can have crystallized you can have crystallized he can have crystallized we can have crystallized you can have crystallized they can have crystallized
V-ing perfect
I can have been crystallizing you can have been crystallizing he can have been crystallizing we can have been crystallizing you can have been crystallizing they can have been crystallizing
Negation
Simple form
I can't crystallize you can't crystallize he can't crystallize we can't crystallize you can't crystallize they can't crystallize
V-ing form
I can't be crystallizing you can't be crystallizing he can't be crystallizing we can't be crystallizing you can't be crystallizing they can't be crystallizing
Perfect
I can't have crystallized you can't have crystallized he can't have crystallized we can't have crystallized you can't have crystallized they can't have crystallized
V-ing perfect
I can't have been crystallizing you can't have been crystallizing he can't have been crystallizing we can't have been crystallizing you can't have been crystallizing they can't have been crystallizing
Interrogative form
Simple form
can I crystallize? can you crystallize? can he crystallize? can we crystallize? can you crystallize? can they crystallize?
V-ing form
can I be crystallizing? can you be crystallizing? can he be crystallizing? can we be crystallizing? can you be crystallizing? can they be crystallizing?
Perfect
can I have crystallized? can you have crystallized? can he have crystallized? can we have crystallized? can you have crystallized? can they have crystallized?
V-ing perfect
can I have been crystallizing? can you have been crystallizing? can he have been crystallizing? can we have been crystallizing? can you have been crystallizing? can they have been crystallizing?
Interro-negative form
Simple form
can't I crystallize? can't you crystallize? can't he crystallize? can't we crystallize? can't you crystallize? can't they crystallize?
V-ing form
can't I be crystallizing? can't you be crystallizing? can't he be crystallizing? can't we be crystallizing? can't you be crystallizing? can't they be crystallizing?
Perfect
can't I have crystallized? can't you have crystallized? can't he have crystallized? can't we have crystallized? can't you have crystallized? can't they have crystallized?
V-ing perfect
can't I have been crystallizing? can't you have been crystallizing? can't he have been crystallizing? can't we have been crystallizing? can't you have been crystallizing? can't they have been crystallizing?