I can reform you can reform he can reform we can reform you can reform they can reform
V-ing form
I can be reforming you can be reforming he can be reforming we can be reforming you can be reforming they can be reforming
Perfect
I can have reformed you can have reformed he can have reformed we can have reformed you can have reformed they can have reformed
V-ing perfect
I can have been reforming you can have been reforming he can have been reforming we can have been reforming you can have been reforming they can have been reforming
Negation
Simple form
I can't reform you can't reform he can't reform we can't reform you can't reform they can't reform
V-ing form
I can't be reforming you can't be reforming he can't be reforming we can't be reforming you can't be reforming they can't be reforming
Perfect
I can't have reformed you can't have reformed he can't have reformed we can't have reformed you can't have reformed they can't have reformed
V-ing perfect
I can't have been reforming you can't have been reforming he can't have been reforming we can't have been reforming you can't have been reforming they can't have been reforming
Interrogative form
Simple form
can I reform? can you reform? can he reform? can we reform? can you reform? can they reform?
V-ing form
can I be reforming? can you be reforming? can he be reforming? can we be reforming? can you be reforming? can they be reforming?
Perfect
can I have reformed? can you have reformed? can he have reformed? can we have reformed? can you have reformed? can they have reformed?
V-ing perfect
can I have been reforming? can you have been reforming? can he have been reforming? can we have been reforming? can you have been reforming? can they have been reforming?
Interro-negative form
Simple form
can't I reform? can't you reform? can't he reform? can't we reform? can't you reform? can't they reform?
V-ing form
can't I be reforming? can't you be reforming? can't he be reforming? can't we be reforming? can't you be reforming? can't they be reforming?
Perfect
can't I have reformed? can't you have reformed? can't he have reformed? can't we have reformed? can't you have reformed? can't they have reformed?
V-ing perfect
can't I have been reforming? can't you have been reforming? can't he have been reforming? can't we have been reforming? can't you have been reforming? can't they have been reforming?