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