I must burden you must burden he must burden we must burden you must burden they must burden
Forme en V-ing
I must be burdening you must be burdening he must be burdening we must be burdening you must be burdening they must be burdening
Perfect
I must have burdened you must have burdened he must have burdened we must have burdened you must have burdened they must have burdened
Perfect en V-ing
I must have been burdening you must have been burdening he must have been burdening we must have been burdening you must have been burdening they must have been burdening
Négation
Forme simple
I mustn't burden you mustn't burden he mustn't burden we mustn't burden you mustn't burden they mustn't burden
Forme en V-ing
I mustn't be burdening you mustn't be burdening he mustn't be burdening we mustn't be burdening you mustn't be burdening they mustn't be burdening
Perfect
I mustn't have burdened you mustn't have burdened he mustn't have burdened we mustn't have burdened you mustn't have burdened they mustn't have burdened
Perfect en V-ing
I mustn't have been burdening you mustn't have been burdening he mustn't have been burdening we mustn't have been burdening you mustn't have been burdening they mustn't have been burdening
Forme interrogative
Forme simple
must I burden? must you burden? must he burden? must we burden? must you burden? must they burden?
Forme en V-ing
must I be burdening? must you be burdening? must he be burdening? must we be burdening? must you be burdening? must they be burdening?
Perfect
must I have burdened? must you have burdened? must he have burdened? must we have burdened? must you have burdened? must they have burdened?
Perfect en V-ing
must I have been burdening? must you have been burdening? must he have been burdening? must we have been burdening? must you have been burdening? must they have been burdening?
Forme interro-négative
Forme simple
mustn't I burden? mustn't you burden? mustn't he burden? mustn't we burden? mustn't you burden? mustn't they burden?
Forme en V-ing
mustn't I be burdening? mustn't you be burdening? mustn't he be burdening? mustn't we be burdening? mustn't you be burdening? mustn't they be burdening?
Perfect
mustn't I have burdened? mustn't you have burdened? mustn't he have burdened? mustn't we have burdened? mustn't you have burdened? mustn't they have burdened?
Perfect en V-ing
mustn't I have been burdening? mustn't you have been burdening? mustn't he have been burdening? mustn't we have been burdening? mustn't you have been burdening? mustn't they have been burdening?