I could demineralise you could demineralise he could demineralise we could demineralise you could demineralise they could demineralise
V-ing form
I could be demineralising you could be demineralising he could be demineralising we could be demineralising you could be demineralising they could be demineralising
Perfect
I could have demineralised you could have demineralised he could have demineralised we could have demineralised you could have demineralised they could have demineralised
V-ing perfect
I could have been demineralising you could have been demineralising he could have been demineralising we could have been demineralising you could have been demineralising they could have been demineralising
Negation
Simple form
I could not demineralise you could not demineralise he could not demineralise we could not demineralise you could not demineralise they could not demineralise
V-ing form
I could not be demineralising you could not be demineralising he could not be demineralising we could not be demineralising you could not be demineralising they could not be demineralising
Perfect
I could not have demineralised you could not have demineralised he could not have demineralised we could not have demineralised you could not have demineralised they could not have demineralised
V-ing perfect
I could not have been demineralising you could not have been demineralising he could not have been demineralising we could not have been demineralising you could not have been demineralising they could not have been demineralising
Interrogative form
Simple form
could I demineralise? could you demineralise? could he demineralise? could we demineralise? could you demineralise? could they demineralise?
V-ing form
could I be demineralising? could you be demineralising? could he be demineralising? could we be demineralising? could you be demineralising? could they be demineralising?
Perfect
could I have demineralised? could you have demineralised? could he have demineralised? could we have demineralised? could you have demineralised? could they have demineralised?
V-ing perfect
could I have been demineralising? could you have been demineralising? could he have been demineralising? could we have been demineralising? could you have been demineralising? could they have been demineralising?
Interro-negative form
Simple form
could I not demineralise? could you not demineralise? could he not demineralise? could we not demineralise? could you not demineralise? could they not demineralise?
V-ing form
could I not be demineralising? could you not be demineralising? could he not be demineralising? could we not be demineralising? could you not be demineralising? could they not be demineralising?
Perfect
could I not have demineralised? could you not have demineralised? could he not have demineralised? could we not have demineralised? could you not have demineralised? could they not have demineralised?
V-ing perfect
could I not have been demineralising? could you not have been demineralising? could he not have been demineralising? could we not have been demineralising? could you not have been demineralising? could they not have been demineralising?