could grain
Verbo regular: grain - grained- grained

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could grain
you could grain
she could grain
we could grain
you could grain
they could grain 	I could be graining
you could be graining
she could be graining
we could be graining
you could be graining
they could be graining	I could have grained
you could have grained
she could have grained
we could have grained
you could have grained
they could have grained	I could have been graining
you could have been graining
she could have been graining
we could have been graining
you could have been graining
they could have been graining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not grain
you could not grain
she could not grain
we could not grain
you could not grain
they could not grain 	I could not be graining
you could not be graining
she could not be graining
we could not be graining
you could not be graining
they could not be graining	I could not have grained
you could not have grained
she could not have grained
we could not have grained
you could not have grained
they could not have grained	I could not have been graining
you could not have been graining
she could not have been graining
we could not have been graining
you could not have been graining
they could not have been graining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I grain?
could you grain?
could she grain?
could we grain?
could you grain?
could they grain? 	could I be graining?
could you be graining?
could she be graining?
could we be graining?
could you be graining?
could they be graining? 	could I have grained?
could you have grained?
could she have grained?
could we have grained?
could you have grained?
could they have grained? 	could I have been graining?
could you have been graining?
could she have been graining?
could we have been graining?
could you have been graining?
could they have been graining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not grain?
could you not grain?
could she not grain?
could we not grain?
could you not grain?
could they not grain? 	could I not be graining?
could you not be graining?
could she not be graining?
could we not be graining?
could you not be graining?
could they not be graining? 	could I not have grained?
could you not have grained?
could she not have grained?
could we not have grained?
could you not have grained?
could they not have grained? 	could I not have been graining?
could you not have been graining?
could she not have been graining?
could we not have been graining?
could you not have been graining?
could they not have been graining?