I could systematise you could systematise she could systematise we could systematise you could systematise they could systematise
Forme en V-ing
I could be systematising you could be systematising she could be systematising we could be systematising you could be systematising they could be systematising
Perfect
I could have systematised you could have systematised she could have systematised we could have systematised you could have systematised they could have systematised
Perfect en V-ing
I could have been systematising you could have been systematising she could have been systematising we could have been systematising you could have been systematising they could have been systematising
Négation
Forme simple
I couldn't systematise you couldn't systematise she couldn't systematise we couldn't systematise you couldn't systematise they couldn't systematise
Forme en V-ing
I couldn't be systematising you couldn't be systematising she couldn't be systematising we couldn't be systematising you couldn't be systematising they couldn't be systematising
Perfect
I couldn't have systematised you couldn't have systematised she couldn't have systematised we couldn't have systematised you couldn't have systematised they couldn't have systematised
Perfect en V-ing
I couldn't have been systematising you couldn't have been systematising she couldn't have been systematising we couldn't have been systematising you couldn't have been systematising they couldn't have been systematising
Forme interrogative
Forme simple
could I systematise? could you systematise? could she systematise? could we systematise? could you systematise? could they systematise?
Forme en V-ing
could I be systematising? could you be systematising? could she be systematising? could we be systematising? could you be systematising? could they be systematising?
Perfect
could I have systematised? could you have systematised? could she have systematised? could we have systematised? could you have systematised? could they have systematised?
Perfect en V-ing
could I have been systematising? could you have been systematising? could she have been systematising? could we have been systematising? could you have been systematising? could they have been systematising?
Forme interro-négative
Forme simple
couldn't I systematise? couldn't you systematise? couldn't she systematise? couldn't we systematise? couldn't you systematise? couldn't they systematise?
Forme en V-ing
couldn't I be systematising? couldn't you be systematising? couldn't she be systematising? couldn't we be systematising? couldn't you be systematising? couldn't they be systematising?
Perfect
couldn't I have systematised? couldn't you have systematised? couldn't she have systematised? couldn't we have systematised? couldn't you have systematised? couldn't they have systematised?
Perfect en V-ing
couldn't I have been systematising? couldn't you have been systematising? couldn't she have been systematising? couldn't we have been systematising? couldn't you have been systematising? couldn't they have been systematising?