I could stapedectomise you could stapedectomise he could stapedectomise we could stapedectomise you could stapedectomise they could stapedectomise
V-ing form
I could be stapedectomising you could be stapedectomising he could be stapedectomising we could be stapedectomising you could be stapedectomising they could be stapedectomising
Perfect
I could have stapedectomised you could have stapedectomised he could have stapedectomised we could have stapedectomised you could have stapedectomised they could have stapedectomised
V-ing perfect
I could have been stapedectomising you could have been stapedectomising he could have been stapedectomising we could have been stapedectomising you could have been stapedectomising they could have been stapedectomising
Negation
Simple form
I could not stapedectomise you could not stapedectomise he could not stapedectomise we could not stapedectomise you could not stapedectomise they could not stapedectomise
V-ing form
I could not be stapedectomising you could not be stapedectomising he could not be stapedectomising we could not be stapedectomising you could not be stapedectomising they could not be stapedectomising
Perfect
I could not have stapedectomised you could not have stapedectomised he could not have stapedectomised we could not have stapedectomised you could not have stapedectomised they could not have stapedectomised
V-ing perfect
I could not have been stapedectomising you could not have been stapedectomising he could not have been stapedectomising we could not have been stapedectomising you could not have been stapedectomising they could not have been stapedectomising
Interrogative form
Simple form
could I stapedectomise? could you stapedectomise? could he stapedectomise? could we stapedectomise? could you stapedectomise? could they stapedectomise?
V-ing form
could I be stapedectomising? could you be stapedectomising? could he be stapedectomising? could we be stapedectomising? could you be stapedectomising? could they be stapedectomising?
Perfect
could I have stapedectomised? could you have stapedectomised? could he have stapedectomised? could we have stapedectomised? could you have stapedectomised? could they have stapedectomised?
V-ing perfect
could I have been stapedectomising? could you have been stapedectomising? could he have been stapedectomising? could we have been stapedectomising? could you have been stapedectomising? could they have been stapedectomising?
Interro-negative form
Simple form
could I not stapedectomise? could you not stapedectomise? could he not stapedectomise? could we not stapedectomise? could you not stapedectomise? could they not stapedectomise?
V-ing form
could I not be stapedectomising? could you not be stapedectomising? could he not be stapedectomising? could we not be stapedectomising? could you not be stapedectomising? could they not be stapedectomising?
Perfect
could I not have stapedectomised? could you not have stapedectomised? could he not have stapedectomised? could we not have stapedectomised? could you not have stapedectomised? could they not have stapedectomised?
V-ing perfect
could I not have been stapedectomising? could you not have been stapedectomising? could he not have been stapedectomising? could we not have been stapedectomising? could you not have been stapedectomising? could they not have been stapedectomising?