could boost
Verbo regular: boost - boosted- boosted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could boost
you could boost
he could boost
we could boost
you could boost
they could boost 	I could be boosting
you could be boosting
he could be boosting
we could be boosting
you could be boosting
they could be boosting	I could have boosted
you could have boosted
he could have boosted
we could have boosted
you could have boosted
they could have boosted	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 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not boost
you could not boost
he could not boost
we could not boost
you could not boost
they could not boost 	I could not be boosting
you could not be boosting
he could not be boosting
we could not be boosting
you could not be boosting
they could not be boosting	I could not have boosted
you could not have boosted
he could not have boosted
we could not have boosted
you could not have boosted
they could not have boosted	I could not have been boosting
you could not have been boosting
he could not have been boosting
we could not have been boosting
you could not have been boosting
they could not have been boosting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I boost?
could you boost?
could he boost?
could we boost?
could you boost?
could they boost? 	could I be boosting?
could you be boosting?
could he be boosting?
could we be boosting?
could you be boosting?
could they be boosting? 	could I have boosted?
could you have boosted?
could he have boosted?
could we have boosted?
could you have boosted?
could they have boosted? 	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 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not boost?
could you not boost?
could he not boost?
could we not boost?
could you not boost?
could they not boost? 	could I not be boosting?
could you not be boosting?
could he not be boosting?
could we not be boosting?
could you not be boosting?
could they not be boosting? 	could I not have boosted?
could you not have boosted?
could he not have boosted?
could we not have boosted?
could you not have boosted?
could they not have boosted? 	could I not have been boosting?
could you not have been boosting?
could he not have been boosting?
could we not have been boosting?
could you not have been boosting?
could they not have been boosting?