Conjugación del verbo inglés
COULD GRIND

Verbo irregular: grind - ground - ground

Afirmación

Forma simple	Forma con V-ing
I could grind you could grind he could grind we could grind you could grind they could grind	I could be grinding you could be grinding he could be grinding we could be grinding you could be grinding they could be grinding
Perfecto	Perfecto con V-ing
I could have ground you could have ground he could have ground we could have ground you could have ground they could have ground	I could have been grinding you could have been grinding he could have been grinding we could have been grinding you could have been grinding they could have been grinding

Negación

Forma simple	Forma con V-ing
I couldn't grind you couldn't grind he couldn't grind we couldn't grind you couldn't grind they couldn't grind	I couldn't be grinding you couldn't be grinding he couldn't be grinding we couldn't be grinding you couldn't be grinding they couldn't be grinding
Perfecto	Perfecto con V-ing
I couldn't have ground you couldn't have ground he couldn't have ground we couldn't have ground you couldn't have ground they couldn't have ground	I couldn't have been grinding you couldn't have been grinding he couldn't have been grinding we couldn't have been grinding you couldn't have been grinding they couldn't have been grinding

Forma interrogativa

Forma simple	Forma con V-ing
could I grind? could you grind? could he grind? could we grind? could you grind? could they grind?	could I be grinding? could you be grinding? could he be grinding? could we be grinding? could you be grinding? could they be grinding?
Perfecto	Perfecto con V-ing
could I have ground? could you have ground? could he have ground? could we have ground? could you have ground? could they have ground?	could I have been grinding? could you have been grinding? could he have been grinding? could we have been grinding? could you have been grinding? could they have been grinding?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I grind? couldn't you grind? couldn't he grind? couldn't we grind? couldn't you grind? couldn't they grind?	couldn't I be grinding? couldn't you be grinding? couldn't he be grinding? couldn't we be grinding? couldn't you be grinding? couldn't they be grinding?
Perfecto	Perfecto con V-ing
couldn't I have ground? couldn't you have ground? couldn't he have ground? couldn't we have ground? couldn't you have ground? couldn't they have ground?	couldn't I have been grinding? couldn't you have been grinding? couldn't he have been grinding? couldn't we have been grinding? couldn't you have been grinding? couldn't they have been grinding?