I could schematise you could schematise he could schematise we could schematise you could schematise they could schematise
V-ing form
I could be schematising you could be schematising he could be schematising we could be schematising you could be schematising they could be schematising
Perfect
I could have schematised you could have schematised he could have schematised we could have schematised you could have schematised they could have schematised
V-ing perfect
I could have been schematising you could have been schematising he could have been schematising we could have been schematising you could have been schematising they could have been schematising
Negation
Simple form
I could not schematise you could not schematise he could not schematise we could not schematise you could not schematise they could not schematise
V-ing form
I could not be schematising you could not be schematising he could not be schematising we could not be schematising you could not be schematising they could not be schematising
Perfect
I could not have schematised you could not have schematised he could not have schematised we could not have schematised you could not have schematised they could not have schematised
V-ing perfect
I could not have been schematising you could not have been schematising he could not have been schematising we could not have been schematising you could not have been schematising they could not have been schematising
Interrogative form
Simple form
could I schematise? could you schematise? could he schematise? could we schematise? could you schematise? could they schematise?
V-ing form
could I be schematising? could you be schematising? could he be schematising? could we be schematising? could you be schematising? could they be schematising?
Perfect
could I have schematised? could you have schematised? could he have schematised? could we have schematised? could you have schematised? could they have schematised?
V-ing perfect
could I have been schematising? could you have been schematising? could he have been schematising? could we have been schematising? could you have been schematising? could they have been schematising?
Interro-negative form
Simple form
could I not schematise? could you not schematise? could he not schematise? could we not schematise? could you not schematise? could they not schematise?
V-ing form
could I not be schematising? could you not be schematising? could he not be schematising? could we not be schematising? could you not be schematising? could they not be schematising?
Perfect
could I not have schematised? could you not have schematised? could he not have schematised? could we not have schematised? could you not have schematised? could they not have schematised?
V-ing perfect
could I not have been schematising? could you not have been schematising? could he not have been schematising? could we not have been schematising? could you not have been schematising? could they not have been schematising?