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