could grunt
Verbo regular: grunt - grunted- grunted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could grunt
you could grunt
she could grunt
we could grunt
you could grunt
they could grunt 	I could be grunting
you could be grunting
she could be grunting
we could be grunting
you could be grunting
they could be grunting	I could have grunted
you could have grunted
she could have grunted
we could have grunted
you could have grunted
they could have grunted	I could have been grunting
you could have been grunting
she could have been grunting
we could have been grunting
you could have been grunting
they could have been grunting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not grunt
you could not grunt
she could not grunt
we could not grunt
you could not grunt
they could not grunt 	I could not be grunting
you could not be grunting
she could not be grunting
we could not be grunting
you could not be grunting
they could not be grunting	I could not have grunted
you could not have grunted
she could not have grunted
we could not have grunted
you could not have grunted
they could not have grunted	I could not have been grunting
you could not have been grunting
she could not have been grunting
we could not have been grunting
you could not have been grunting
they could not have been grunting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I grunt?
could you grunt?
could she grunt?
could we grunt?
could you grunt?
could they grunt? 	could I be grunting?
could you be grunting?
could she be grunting?
could we be grunting?
could you be grunting?
could they be grunting? 	could I have grunted?
could you have grunted?
could she have grunted?
could we have grunted?
could you have grunted?
could they have grunted? 	could I have been grunting?
could you have been grunting?
could she have been grunting?
could we have been grunting?
could you have been grunting?
could they have been grunting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not grunt?
could you not grunt?
could she not grunt?
could we not grunt?
could you not grunt?
could they not grunt? 	could I not be grunting?
could you not be grunting?
could she not be grunting?
could we not be grunting?
could you not be grunting?
could they not be grunting? 	could I not have grunted?
could you not have grunted?
could she not have grunted?
could we not have grunted?
could you not have grunted?
could they not have grunted? 	could I not have been grunting?
could you not have been grunting?
could she not have been grunting?
could we not have been grunting?
could you not have been grunting?
could they not have been grunting?