I could boost you could boost she could boost we could boost you could boost they could boost
Forme en V-ing
I could be boosting you could be boosting she could be boosting we could be boosting you could be boosting they could be boosting
Perfect
I could have boosted you could have boosted she could have boosted we could have boosted you could have boosted they could have boosted
Perfect en V-ing
I could have been boosting you could have been boosting she could have been boosting we could have been boosting you could have been boosting they could have been boosting
Négation
Forme simple
I could not boost you could not boost she could not boost we could not boost you could not boost they could not boost
Forme en V-ing
I could not be boosting you could not be boosting she could not be boosting we could not be boosting you could not be boosting they could not be boosting
Perfect
I could not have boosted you could not have boosted she could not have boosted we could not have boosted you could not have boosted they could not have boosted
Perfect en V-ing
I could not have been boosting you could not have been boosting she could not have been boosting we could not have been boosting you could not have been boosting they could not have been boosting
Forme interrogative
Forme simple
could I boost? could you boost? could she boost? could we boost? could you boost? could they boost?
Forme en V-ing
could I be boosting? could you be boosting? could she be boosting? could we be boosting? could you be boosting? could they be boosting?
Perfect
could I have boosted? could you have boosted? could she have boosted? could we have boosted? could you have boosted? could they have boosted?
Perfect en V-ing
could I have been boosting? could you have been boosting? could she have been boosting? could we have been boosting? could you have been boosting? could they have been boosting?
Forme interro-négative
Forme simple
could I not boost? could you not boost? could she not boost? could we not boost? could you not boost? could they not boost?
Forme en V-ing
could I not be boosting? could you not be boosting? could she not be boosting? could we not be boosting? could you not be boosting? could they not be boosting?
Perfect
could I not have boosted? could you not have boosted? could she not have boosted? could we not have boosted? could you not have boosted? could they not have boosted?
Perfect en V-ing
could I not have been boosting? could you not have been boosting? could she not have been boosting? could we not have been boosting? could you not have been boosting? could they not have been boosting?