I could schematise you could schematise he could schematise we could schematise you could schematise they could schematise
Forme en V-ing
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
Perfect en V-ing
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
Négation
Forme simple
I couldn't schematise you couldn't schematise he couldn't schematise we couldn't schematise you couldn't schematise they couldn't schematise
Forme en V-ing
I couldn't be schematising you couldn't be schematising he couldn't be schematising we couldn't be schematising you couldn't be schematising they couldn't be schematising
Perfect
I couldn't have schematised you couldn't have schematised he couldn't have schematised we couldn't have schematised you couldn't have schematised they couldn't have schematised
Perfect en V-ing
I couldn't have been schematising you couldn't have been schematising he couldn't have been schematising we couldn't have been schematising you couldn't have been schematising they couldn't have been schematising
Forme interrogative
Forme simple
could I schematise? could you schematise? could he schematise? could we schematise? could you schematise? could they schematise?
Forme en V-ing
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?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
couldn't I schematise? couldn't you schematise? couldn't he schematise? couldn't we schematise? couldn't you schematise? couldn't they schematise?
Forme en V-ing
couldn't I be schematising? couldn't you be schematising? couldn't he be schematising? couldn't we be schematising? couldn't you be schematising? couldn't they be schematising?
Perfect
couldn't I have schematised? couldn't you have schematised? couldn't he have schematised? couldn't we have schematised? couldn't you have schematised? couldn't they have schematised?
Perfect en V-ing
couldn't I have been schematising? couldn't you have been schematising? couldn't he have been schematising? couldn't we have been schematising? couldn't you have been schematising? couldn't they have been schematising?