could boost
Verbo regular: boost - boosted- boosted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could boost
you could boost
she could boost
we could boost
you could boost
they could boost 	I could be boosting
you could be boosting
she could be boosting
we could be boosting
you could be boosting
they could be boosting	I could have boosted
you could have boosted
she 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
she could have been boosting
we could have been boosting
you could have been boosting
they could have been boosting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not boost
you could not boost
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
could I boost?
could you boost?
could she boost?
could we boost?
could you boost?
could they boost? 	could I be boosting?
could you be boosting?
could she be boosting?
could we be boosting?
could you be boosting?
could they be boosting? 	could I have boosted?
could you have boosted?
could she 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 she have been boosting?
could we have been boosting?
could you have been boosting?
could they have been boosting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not boost?
could you not boost?
could she 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 she 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 she 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 she not have been boosting?
could we not have been boosting?
could you not have been boosting?
could they not have been boosting?