could foster
Verbo regular: foster - fostered- fostered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could foster
you could foster
she could foster
we could foster
you could foster
they could foster 	I could be fostering
you could be fostering
she could be fostering
we could be fostering
you could be fostering
they could be fostering	I could have fostered
you could have fostered
she could have fostered
we could have fostered
you could have fostered
they could have fostered	I could have been fostering
you could have been fostering
she could have been fostering
we could have been fostering
you could have been fostering
they could have been fostering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not foster
you could not foster
she could not foster
we could not foster
you could not foster
they could not foster 	I could not be fostering
you could not be fostering
she could not be fostering
we could not be fostering
you could not be fostering
they could not be fostering	I could not have fostered
you could not have fostered
she could not have fostered
we could not have fostered
you could not have fostered
they could not have fostered	I could not have been fostering
you could not have been fostering
she could not have been fostering
we could not have been fostering
you could not have been fostering
they could not have been fostering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I foster?
could you foster?
could she foster?
could we foster?
could you foster?
could they foster? 	could I be fostering?
could you be fostering?
could she be fostering?
could we be fostering?
could you be fostering?
could they be fostering? 	could I have fostered?
could you have fostered?
could she have fostered?
could we have fostered?
could you have fostered?
could they have fostered? 	could I have been fostering?
could you have been fostering?
could she have been fostering?
could we have been fostering?
could you have been fostering?
could they have been fostering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not foster?
could you not foster?
could she not foster?
could we not foster?
could you not foster?
could they not foster? 	could I not be fostering?
could you not be fostering?
could she not be fostering?
could we not be fostering?
could you not be fostering?
could they not be fostering? 	could I not have fostered?
could you not have fostered?
could she not have fostered?
could we not have fostered?
could you not have fostered?
could they not have fostered? 	could I not have been fostering?
could you not have been fostering?
could she not have been fostering?
could we not have been fostering?
could you not have been fostering?
could they not have been fostering?