could school
Verbo regular: school - schooled- schooled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could school
you could school
he could school
we could school
you could school
they could school 	I could be schooling
you could be schooling
he could be schooling
we could be schooling
you could be schooling
they could be schooling	I could have schooled
you could have schooled
he could have schooled
we could have schooled
you could have schooled
they could have schooled	I could have been schooling
you could have been schooling
he could have been schooling
we could have been schooling
you could have been schooling
they could have been schooling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not school
you could not school
he could not school
we could not school
you could not school
they could not school 	I could not be schooling
you could not be schooling
he could not be schooling
we could not be schooling
you could not be schooling
they could not be schooling	I could not have schooled
you could not have schooled
he could not have schooled
we could not have schooled
you could not have schooled
they could not have schooled	I could not have been schooling
you could not have been schooling
he could not have been schooling
we could not have been schooling
you could not have been schooling
they could not have been schooling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I school?
could you school?
could he school?
could we school?
could you school?
could they school? 	could I be schooling?
could you be schooling?
could he be schooling?
could we be schooling?
could you be schooling?
could they be schooling? 	could I have schooled?
could you have schooled?
could he have schooled?
could we have schooled?
could you have schooled?
could they have schooled? 	could I have been schooling?
could you have been schooling?
could he have been schooling?
could we have been schooling?
could you have been schooling?
could they have been schooling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not school?
could you not school?
could he not school?
could we not school?
could you not school?
could they not school? 	could I not be schooling?
could you not be schooling?
could he not be schooling?
could we not be schooling?
could you not be schooling?
could they not be schooling? 	could I not have schooled?
could you not have schooled?
could he not have schooled?
could we not have schooled?
could you not have schooled?
could they not have schooled? 	could I not have been schooling?
could you not have been schooling?
could he not have been schooling?
could we not have been schooling?
could you not have been schooling?
could they not have been schooling?