I can qualify you can qualify he can qualify we can qualify you can qualify they can qualify
V-ing form
I can be qualifying you can be qualifying he can be qualifying we can be qualifying you can be qualifying they can be qualifying
Perfect
I can have qualified you can have qualified he can have qualified we can have qualified you can have qualified they can have qualified
V-ing perfect
I can have been qualifying you can have been qualifying he can have been qualifying we can have been qualifying you can have been qualifying they can have been qualifying
Negation
Simple form
I cannot qualify you cannot qualify he cannot qualify we cannot qualify you cannot qualify they cannot qualify
V-ing form
I cannot be qualifying you cannot be qualifying he cannot be qualifying we cannot be qualifying you cannot be qualifying they cannot be qualifying
Perfect
I cannot have qualified you cannot have qualified he cannot have qualified we cannot have qualified you cannot have qualified they cannot have qualified
V-ing perfect
I cannot have been qualifying you cannot have been qualifying he cannot have been qualifying we cannot have been qualifying you cannot have been qualifying they cannot have been qualifying
Interrogative form
Simple form
can I qualify? can you qualify? can he qualify? can we qualify? can you qualify? can they qualify?
V-ing form
can I be qualifying? can you be qualifying? can he be qualifying? can we be qualifying? can you be qualifying? can they be qualifying?
Perfect
can I have qualified? can you have qualified? can he have qualified? can we have qualified? can you have qualified? can they have qualified?
V-ing perfect
can I have been qualifying? can you have been qualifying? can he have been qualifying? can we have been qualifying? can you have been qualifying? can they have been qualifying?
Interro-negative form
Simple form
can I not qualify? can you not qualify? can he not qualify? can we not qualify? can you not qualify? can they not qualify?
V-ing form
can I not be qualifying? can you not be qualifying? can he not be qualifying? can we not be qualifying? can you not be qualifying? can they not be qualifying?
Perfect
can I not have qualified? can you not have qualified? can he not have qualified? can we not have qualified? can you not have qualified? can they not have qualified?
V-ing perfect
can I not have been qualifying? can you not have been qualifying? can he not have been qualifying? can we not have been qualifying? can you not have been qualifying? can they not have been qualifying?