Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Affirmation
Forme simple
I could stay up you could stay up she could stay up we could stay up you could stay up they could stay up
Forme en V-ing
I could be stay uping you could be stay uping she could be stay uping we could be stay uping you could be stay uping they could be stay uping
Perfect
I could have stay uped you could have stay uped she could have stay uped we could have stay uped you could have stay uped they could have stay uped
Perfect en V-ing
I could have been stay uping you could have been stay uping she could have been stay uping we could have been stay uping you could have been stay uping they could have been stay uping
Négation
Forme simple
I couldn't stay up you couldn't stay up she couldn't stay up we couldn't stay up you couldn't stay up they couldn't stay up
Forme en V-ing
I couldn't be stay uping you couldn't be stay uping she couldn't be stay uping we couldn't be stay uping you couldn't be stay uping they couldn't be stay uping
Perfect
I couldn't have stay uped you couldn't have stay uped she couldn't have stay uped we couldn't have stay uped you couldn't have stay uped they couldn't have stay uped
Perfect en V-ing
I couldn't have been stay uping you couldn't have been stay uping she couldn't have been stay uping we couldn't have been stay uping you couldn't have been stay uping they couldn't have been stay uping
Forme interrogative
Forme simple
could I stay up? could you stay up? could she stay up? could we stay up? could you stay up? could they stay up?
Forme en V-ing
could I be stay uping? could you be stay uping? could she be stay uping? could we be stay uping? could you be stay uping? could they be stay uping?
Perfect
could I have stay uped? could you have stay uped? could she have stay uped? could we have stay uped? could you have stay uped? could they have stay uped?
Perfect en V-ing
could I have been stay uping? could you have been stay uping? could she have been stay uping? could we have been stay uping? could you have been stay uping? could they have been stay uping?
Forme interro-négative
Forme simple
couldn't I stay up? couldn't you stay up? couldn't she stay up? couldn't we stay up? couldn't you stay up? couldn't they stay up?
Forme en V-ing
couldn't I be stay uping? couldn't you be stay uping? couldn't she be stay uping? couldn't we be stay uping? couldn't you be stay uping? couldn't they be stay uping?
Perfect
couldn't I have stay uped? couldn't you have stay uped? couldn't she have stay uped? couldn't we have stay uped? couldn't you have stay uped? couldn't they have stay uped?
Perfect en V-ing
couldn't I have been stay uping? couldn't you have been stay uping? couldn't she have been stay uping? couldn't we have been stay uping? couldn't you have been stay uping? couldn't they have been stay uping?