I can reharden you can reharden he can reharden we can reharden you can reharden they can reharden
V-ing form
I can be rehardening you can be rehardening he can be rehardening we can be rehardening you can be rehardening they can be rehardening
Perfect
I can have rehardened you can have rehardened he 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 he 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 he cannot reharden we cannot reharden you cannot reharden they cannot reharden
V-ing form
I cannot be rehardening you cannot be rehardening he cannot be rehardening we cannot be rehardening you cannot be rehardening they cannot be rehardening
Perfect
I cannot have rehardened you cannot have rehardened he 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 he 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 he reharden? can we reharden? can you reharden? can they reharden?
V-ing form
can I be rehardening? can you be rehardening? can he be rehardening? can we be rehardening? can you be rehardening? can they be rehardening?
Perfect
can I have rehardened? can you have rehardened? can he 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 he 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 he 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 he 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 he 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 he not have been rehardening? can we not have been rehardening? can you not have been rehardening? can they not have been rehardening?