I can reharden you can reharden she can reharden we can reharden you can reharden they can reharden
V-ing form
I can be rehardening you can be rehardening she can be rehardening we can be rehardening you can be rehardening they can be rehardening
Perfect
I can have rehardened you can have rehardened she can have rehardened we can have rehardened you can have rehardened they can have rehardened
V-ing perfect
I can have been rehardening you can have been rehardening she can have been rehardening we can have been rehardening you can have been rehardening they can have been rehardening
Negation
Simple form
I cannot reharden you cannot reharden she cannot reharden we cannot reharden you cannot reharden they cannot reharden
V-ing form
I cannot be rehardening you cannot be rehardening she cannot be rehardening we cannot be rehardening you cannot be rehardening they cannot be rehardening
Perfect
I cannot have rehardened you cannot have rehardened she cannot have rehardened we cannot have rehardened you cannot have rehardened they cannot have rehardened
V-ing perfect
I cannot have been rehardening you cannot have been rehardening she cannot have been rehardening we cannot have been rehardening you cannot have been rehardening they cannot have been rehardening
Interrogative form
Simple form
can I reharden? can you reharden? can she reharden? can we reharden? can you reharden? can they reharden?
V-ing form
can I be rehardening? can you be rehardening? can she be rehardening? can we be rehardening? can you be rehardening? can they be rehardening?
Perfect
can I have rehardened? can you have rehardened? can she have rehardened? can we have rehardened? can you have rehardened? can they have rehardened?
V-ing perfect
can I have been rehardening? can you have been rehardening? can she have been rehardening? can we have been rehardening? can you have been rehardening? can they have been rehardening?
Interro-negative form
Simple form
can I not reharden? can you not reharden? can she not reharden? can we not reharden? can you not reharden? can they not reharden?
V-ing form
can I not be rehardening? can you not be rehardening? can she not be rehardening? can we not be rehardening? can you not be rehardening? can they not be rehardening?
Perfect
can I not have rehardened? can you not have rehardened? can she not have rehardened? can we not have rehardened? can you not have rehardened? can they not have rehardened?
V-ing perfect
can I not have been rehardening? can you not have been rehardening? can she not have been rehardening? can we not have been rehardening? can you not have been rehardening? can they not have been rehardening?