I could stabilise you could stabilise he could stabilise we could stabilise you could stabilise they could stabilise
V-ing form
I could be stabilising you could be stabilising he could be stabilising we could be stabilising you could be stabilising they could be stabilising
Perfect
I could have stabilised you could have stabilised he could have stabilised we could have stabilised you could have stabilised they could have stabilised
V-ing perfect
I could have been stabilising you could have been stabilising he could have been stabilising we could have been stabilising you could have been stabilising they could have been stabilising
Negation
Simple form
I could not stabilise you could not stabilise he could not stabilise we could not stabilise you could not stabilise they could not stabilise
V-ing form
I could not be stabilising you could not be stabilising he could not be stabilising we could not be stabilising you could not be stabilising they could not be stabilising
Perfect
I could not have stabilised you could not have stabilised he could not have stabilised we could not have stabilised you could not have stabilised they could not have stabilised
V-ing perfect
I could not have been stabilising you could not have been stabilising he could not have been stabilising we could not have been stabilising you could not have been stabilising they could not have been stabilising
Interrogative form
Simple form
could I stabilise? could you stabilise? could he stabilise? could we stabilise? could you stabilise? could they stabilise?
V-ing form
could I be stabilising? could you be stabilising? could he be stabilising? could we be stabilising? could you be stabilising? could they be stabilising?
Perfect
could I have stabilised? could you have stabilised? could he have stabilised? could we have stabilised? could you have stabilised? could they have stabilised?
V-ing perfect
could I have been stabilising? could you have been stabilising? could he have been stabilising? could we have been stabilising? could you have been stabilising? could they have been stabilising?
Interro-negative form
Simple form
could I not stabilise? could you not stabilise? could he not stabilise? could we not stabilise? could you not stabilise? could they not stabilise?
V-ing form
could I not be stabilising? could you not be stabilising? could he not be stabilising? could we not be stabilising? could you not be stabilising? could they not be stabilising?
Perfect
could I not have stabilised? could you not have stabilised? could he not have stabilised? could we not have stabilised? could you not have stabilised? could they not have stabilised?
V-ing perfect
could I not have been stabilising? could you not have been stabilising? could he not have been stabilising? could we not have been stabilising? could you not have been stabilising? could they not have been stabilising?