I could alchemise you could alchemise he could alchemise we could alchemise you could alchemise they could alchemise
V-ing form
I could be alchemising you could be alchemising he could be alchemising we could be alchemising you could be alchemising they could be alchemising
Perfect
I could have alchemised you could have alchemised he could have alchemised we could have alchemised you could have alchemised they could have alchemised
V-ing perfect
I could have been alchemising you could have been alchemising he could have been alchemising we could have been alchemising you could have been alchemising they could have been alchemising
Negation
Simple form
I could not alchemise you could not alchemise he could not alchemise we could not alchemise you could not alchemise they could not alchemise
V-ing form
I could not be alchemising you could not be alchemising he could not be alchemising we could not be alchemising you could not be alchemising they could not be alchemising
Perfect
I could not have alchemised you could not have alchemised he could not have alchemised we could not have alchemised you could not have alchemised they could not have alchemised
V-ing perfect
I could not have been alchemising you could not have been alchemising he could not have been alchemising we could not have been alchemising you could not have been alchemising they could not have been alchemising
Interrogative form
Simple form
could I alchemise? could you alchemise? could he alchemise? could we alchemise? could you alchemise? could they alchemise?
V-ing form
could I be alchemising? could you be alchemising? could he be alchemising? could we be alchemising? could you be alchemising? could they be alchemising?
Perfect
could I have alchemised? could you have alchemised? could he have alchemised? could we have alchemised? could you have alchemised? could they have alchemised?
V-ing perfect
could I have been alchemising? could you have been alchemising? could he have been alchemising? could we have been alchemising? could you have been alchemising? could they have been alchemising?
Interro-negative form
Simple form
could I not alchemise? could you not alchemise? could he not alchemise? could we not alchemise? could you not alchemise? could they not alchemise?
V-ing form
could I not be alchemising? could you not be alchemising? could he not be alchemising? could we not be alchemising? could you not be alchemising? could they not be alchemising?
Perfect
could I not have alchemised? could you not have alchemised? could he not have alchemised? could we not have alchemised? could you not have alchemised? could they not have alchemised?
V-ing perfect
could I not have been alchemising? could you not have been alchemising? could he not have been alchemising? could we not have been alchemising? could you not have been alchemising? could they not have been alchemising?