I could agonise you could agonise he could agonise we could agonise you could agonise they could agonise
V-ing form
I could be agonising you could be agonising he could be agonising we could be agonising you could be agonising they could be agonising
Perfect
I could have agonised you could have agonised he could have agonised we could have agonised you could have agonised they could have agonised
V-ing perfect
I could have been agonising you could have been agonising he could have been agonising we could have been agonising you could have been agonising they could have been agonising
Negation
Simple form
I could not agonise you could not agonise he could not agonise we could not agonise you could not agonise they could not agonise
V-ing form
I could not be agonising you could not be agonising he could not be agonising we could not be agonising you could not be agonising they could not be agonising
Perfect
I could not have agonised you could not have agonised he could not have agonised we could not have agonised you could not have agonised they could not have agonised
V-ing perfect
I could not have been agonising you could not have been agonising he could not have been agonising we could not have been agonising you could not have been agonising they could not have been agonising
Interrogative form
Simple form
could I agonise? could you agonise? could he agonise? could we agonise? could you agonise? could they agonise?
V-ing form
could I be agonising? could you be agonising? could he be agonising? could we be agonising? could you be agonising? could they be agonising?
Perfect
could I have agonised? could you have agonised? could he have agonised? could we have agonised? could you have agonised? could they have agonised?
V-ing perfect
could I have been agonising? could you have been agonising? could he have been agonising? could we have been agonising? could you have been agonising? could they have been agonising?
Interro-negative form
Simple form
could I not agonise? could you not agonise? could he not agonise? could we not agonise? could you not agonise? could they not agonise?
V-ing form
could I not be agonising? could you not be agonising? could he not be agonising? could we not be agonising? could you not be agonising? could they not be agonising?
Perfect
could I not have agonised? could you not have agonised? could he not have agonised? could we not have agonised? could you not have agonised? could they not have agonised?
V-ing perfect
could I not have been agonising? could you not have been agonising? could he not have been agonising? could we not have been agonising? could you not have been agonising? could they not have been agonising?