I could mechanise you could mechanise he could mechanise we could mechanise you could mechanise they could mechanise
V-ing form
I could be mechanising you could be mechanising he could be mechanising we could be mechanising you could be mechanising they could be mechanising
Perfect
I could have mechanised you could have mechanised he could have mechanised we could have mechanised you could have mechanised they could have mechanised
V-ing perfect
I could have been mechanising you could have been mechanising he could have been mechanising we could have been mechanising you could have been mechanising they could have been mechanising
Negation
Simple form
I could not mechanise you could not mechanise he could not mechanise we could not mechanise you could not mechanise they could not mechanise
V-ing form
I could not be mechanising you could not be mechanising he could not be mechanising we could not be mechanising you could not be mechanising they could not be mechanising
Perfect
I could not have mechanised you could not have mechanised he could not have mechanised we could not have mechanised you could not have mechanised they could not have mechanised
V-ing perfect
I could not have been mechanising you could not have been mechanising he could not have been mechanising we could not have been mechanising you could not have been mechanising they could not have been mechanising
Interrogative form
Simple form
could I mechanise? could you mechanise? could he mechanise? could we mechanise? could you mechanise? could they mechanise?
V-ing form
could I be mechanising? could you be mechanising? could he be mechanising? could we be mechanising? could you be mechanising? could they be mechanising?
Perfect
could I have mechanised? could you have mechanised? could he have mechanised? could we have mechanised? could you have mechanised? could they have mechanised?
V-ing perfect
could I have been mechanising? could you have been mechanising? could he have been mechanising? could we have been mechanising? could you have been mechanising? could they have been mechanising?
Interro-negative form
Simple form
could I not mechanise? could you not mechanise? could he not mechanise? could we not mechanise? could you not mechanise? could they not mechanise?
V-ing form
could I not be mechanising? could you not be mechanising? could he not be mechanising? could we not be mechanising? could you not be mechanising? could they not be mechanising?
Perfect
could I not have mechanised? could you not have mechanised? could he not have mechanised? could we not have mechanised? could you not have mechanised? could they not have mechanised?
V-ing perfect
could I not have been mechanising? could you not have been mechanising? could he not have been mechanising? could we not have been mechanising? could you not have been mechanising? could they not have been mechanising?