could school
Verbo regular: school - schooled- schooled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could school
you could school
she could school
we could school
you could school
they could school 	I could be schooling
you could be schooling
she could be schooling
we could be schooling
you could be schooling
they could be schooling	I could have schooled
you could have schooled
she 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
she could have been schooling
we could have been schooling
you could have been schooling
they could have been schooling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not school
you could not school
she 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
she 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
she 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
she 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 com V-ing 	Perfeito 	Perfeito com V-ing 	
could I school?
could you school?
could she school?
could we school?
could you school?
could they school? 	could I be schooling?
could you be schooling?
could she be schooling?
could we be schooling?
could you be schooling?
could they be schooling? 	could I have schooled?
could you have schooled?
could she 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 she have been schooling?
could we have been schooling?
could you have been schooling?
could they have been schooling? 	

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