I could backfill you could backfill she could backfill we could backfill you could backfill they could backfill
Forme en V-ing
I could be backfilling you could be backfilling she could be backfilling we could be backfilling you could be backfilling they could be backfilling
Perfect
I could have backfilled you could have backfilled she could have backfilled we could have backfilled you could have backfilled they could have backfilled
Perfect en V-ing
I could have been backfilling you could have been backfilling she could have been backfilling we could have been backfilling you could have been backfilling they could have been backfilling
Négation
Forme simple
I could not backfill you could not backfill she could not backfill we could not backfill you could not backfill they could not backfill
Forme en V-ing
I could not be backfilling you could not be backfilling she could not be backfilling we could not be backfilling you could not be backfilling they could not be backfilling
Perfect
I could not have backfilled you could not have backfilled she could not have backfilled we could not have backfilled you could not have backfilled they could not have backfilled
Perfect en V-ing
I could not have been backfilling you could not have been backfilling she could not have been backfilling we could not have been backfilling you could not have been backfilling they could not have been backfilling
Forme interrogative
Forme simple
could I backfill? could you backfill? could she backfill? could we backfill? could you backfill? could they backfill?
Forme en V-ing
could I be backfilling? could you be backfilling? could she be backfilling? could we be backfilling? could you be backfilling? could they be backfilling?
Perfect
could I have backfilled? could you have backfilled? could she have backfilled? could we have backfilled? could you have backfilled? could they have backfilled?
Perfect en V-ing
could I have been backfilling? could you have been backfilling? could she have been backfilling? could we have been backfilling? could you have been backfilling? could they have been backfilling?
Forme interro-négative
Forme simple
could I not backfill? could you not backfill? could she not backfill? could we not backfill? could you not backfill? could they not backfill?
Forme en V-ing
could I not be backfilling? could you not be backfilling? could she not be backfilling? could we not be backfilling? could you not be backfilling? could they not be backfilling?
Perfect
could I not have backfilled? could you not have backfilled? could she not have backfilled? could we not have backfilled? could you not have backfilled? could they not have backfilled?
Perfect en V-ing
could I not have been backfilling? could you not have been backfilling? could she not have been backfilling? could we not have been backfilling? could you not have been backfilling? could they not have been backfilling?