I could best you could best he could best we could best you could best they could best
Forma con V-ing
I could be besting you could be besting he could be besting we could be besting you could be besting they could be besting
Perfecto
I could have bested you could have bested he could have bested we could have bested you could have bested they could have bested
Perfecto con V-ing
I could have been besting you could have been besting he could have been besting we could have been besting you could have been besting they could have been besting
Negación
Forma simple
I couldn't best you couldn't best he couldn't best we couldn't best you couldn't best they couldn't best
Forma con V-ing
I couldn't be besting you couldn't be besting he couldn't be besting we couldn't be besting you couldn't be besting they couldn't be besting
Perfecto
I couldn't have bested you couldn't have bested he couldn't have bested we couldn't have bested you couldn't have bested they couldn't have bested
Perfecto con V-ing
I couldn't have been besting you couldn't have been besting he couldn't have been besting we couldn't have been besting you couldn't have been besting they couldn't have been besting
Forma interrogativa
Forma simple
could I best? could you best? could he best? could we best? could you best? could they best?
Forma con V-ing
could I be besting? could you be besting? could he be besting? could we be besting? could you be besting? could they be besting?
Perfecto
could I have bested? could you have bested? could he have bested? could we have bested? could you have bested? could they have bested?
Perfecto con V-ing
could I have been besting? could you have been besting? could he have been besting? could we have been besting? could you have been besting? could they have been besting?
Forma interro-negativa
Forma simple
couldn't I best? couldn't you best? couldn't he best? couldn't we best? couldn't you best? couldn't they best?
Forma con V-ing
couldn't I be besting? couldn't you be besting? couldn't he be besting? couldn't we be besting? couldn't you be besting? couldn't they be besting?
Perfecto
couldn't I have bested? couldn't you have bested? couldn't he have bested? couldn't we have bested? couldn't you have bested? couldn't they have bested?
Perfecto con V-ing
couldn't I have been besting? couldn't you have been besting? couldn't he have been besting? couldn't we have been besting? couldn't you have been besting? couldn't they have been besting?