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