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 can't qualify you can't qualify he can't qualify we can't qualify you can't qualify they can't qualify
V-ing form
I can't be qualifying you can't be qualifying he can't be qualifying we can't be qualifying you can't be qualifying they can't be qualifying
Perfect
I can't have qualified you can't have qualified he can't have qualified we can't have qualified you can't have qualified they can't have qualified
V-ing perfect
I can't have been qualifying you can't have been qualifying he can't have been qualifying we can't have been qualifying you can't have been qualifying they can't 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't I qualify? can't you qualify? can't he qualify? can't we qualify? can't you qualify? can't they qualify?
V-ing form
can't I be qualifying? can't you be qualifying? can't he be qualifying? can't we be qualifying? can't you be qualifying? can't they be qualifying?
Perfect
can't I have qualified? can't you have qualified? can't he have qualified? can't we have qualified? can't you have qualified? can't they have qualified?
V-ing perfect
can't I have been qualifying? can't you have been qualifying? can't he have been qualifying? can't we have been qualifying? can't you have been qualifying? can't they have been qualifying?