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