I can disappear you can disappear he can disappear we can disappear you can disappear they can disappear
V-ing form
I can be disappearing you can be disappearing he can be disappearing we can be disappearing you can be disappearing they can be disappearing
Perfect
I can have disappeared you can have disappeared he can have disappeared we can have disappeared you can have disappeared they can have disappeared
V-ing perfect
I can have been disappearing you can have been disappearing he can have been disappearing we can have been disappearing you can have been disappearing they can have been disappearing
Negation
Simple form
I cannot disappear you cannot disappear he cannot disappear we cannot disappear you cannot disappear they cannot disappear
V-ing form
I cannot be disappearing you cannot be disappearing he cannot be disappearing we cannot be disappearing you cannot be disappearing they cannot be disappearing
Perfect
I cannot have disappeared you cannot have disappeared he cannot have disappeared we cannot have disappeared you cannot have disappeared they cannot have disappeared
V-ing perfect
I cannot have been disappearing you cannot have been disappearing he cannot have been disappearing we cannot have been disappearing you cannot have been disappearing they cannot have been disappearing
Interrogative form
Simple form
can I disappear? can you disappear? can he disappear? can we disappear? can you disappear? can they disappear?
V-ing form
can I be disappearing? can you be disappearing? can he be disappearing? can we be disappearing? can you be disappearing? can they be disappearing?
Perfect
can I have disappeared? can you have disappeared? can he have disappeared? can we have disappeared? can you have disappeared? can they have disappeared?
V-ing perfect
can I have been disappearing? can you have been disappearing? can he have been disappearing? can we have been disappearing? can you have been disappearing? can they have been disappearing?
Interro-negative form
Simple form
can I not disappear? can you not disappear? can he not disappear? can we not disappear? can you not disappear? can they not disappear?
V-ing form
can I not be disappearing? can you not be disappearing? can he not be disappearing? can we not be disappearing? can you not be disappearing? can they not be disappearing?
Perfect
can I not have disappeared? can you not have disappeared? can he not have disappeared? can we not have disappeared? can you not have disappeared? can they not have disappeared?
V-ing perfect
can I not have been disappearing? can you not have been disappearing? can he not have been disappearing? can we not have been disappearing? can you not have been disappearing? can they not have been disappearing?