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