could grit
Verbo regular: grit - gritted- gritted

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could grit
you could grit
he could grit
we could grit
you could grit
they could grit 	I could be gritting
you could be gritting
he could be gritting
we could be gritting
you could be gritting
they could be gritting	I could have gritted
you could have gritted
he could have gritted
we could have gritted
you could have gritted
they could have gritted	I could have been gritting
you could have been gritting
he could have been gritting
we could have been gritting
you could have been gritting
they could have been gritting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't grit
you couldn't grit
he couldn't grit
we couldn't grit
you couldn't grit
they couldn't grit 	I couldn't be gritting
you couldn't be gritting
he couldn't be gritting
we couldn't be gritting
you couldn't be gritting
they couldn't be gritting	I couldn't have gritted
you couldn't have gritted
he couldn't have gritted
we couldn't have gritted
you couldn't have gritted
they couldn't have gritted	I couldn't have been gritting
you couldn't have been gritting
he couldn't have been gritting
we couldn't have been gritting
you couldn't have been gritting
they couldn't have been gritting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I grit?
could you grit?
could he grit?
could we grit?
could you grit?
could they grit? 	could I be gritting?
could you be gritting?
could he be gritting?
could we be gritting?
could you be gritting?
could they be gritting? 	could I have gritted?
could you have gritted?
could he have gritted?
could we have gritted?
could you have gritted?
could they have gritted? 	could I have been gritting?
could you have been gritting?
could he have been gritting?
could we have been gritting?
could you have been gritting?
could they have been gritting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I grit?
couldn't you grit?
couldn't he grit?
couldn't we grit?
couldn't you grit?
couldn't they grit? 	couldn't I be gritting?
couldn't you be gritting?
couldn't he be gritting?
couldn't we be gritting?
couldn't you be gritting?
couldn't they be gritting? 	couldn't I have gritted?
couldn't you have gritted?
couldn't he have gritted?
couldn't we have gritted?
couldn't you have gritted?
couldn't they have gritted? 	couldn't I have been gritting?
couldn't you have been gritting?
couldn't he have been gritting?
couldn't we have been gritting?
couldn't you have been gritting?
couldn't they have been gritting?