Conjugación del verbo inglés
COULD SPUTTER

Verbo regular: sputter - sputtered - sputtered

Afirmación

Forma simple	Forma con V-ing
I could sputter you could sputter he could sputter we could sputter you could sputter they could sputter	I could be sputtering you could be sputtering he could be sputtering we could be sputtering you could be sputtering they could be sputtering
Perfecto	Perfecto con V-ing
I could have sputtered you could have sputtered he could have sputtered we could have sputtered you could have sputtered they could have sputtered	I could have been sputtering you could have been sputtering he could have been sputtering we could have been sputtering you could have been sputtering they could have been sputtering

Negación

Forma simple	Forma con V-ing
I could not sputter you could not sputter he could not sputter we could not sputter you could not sputter they could not sputter	I could not be sputtering you could not be sputtering he could not be sputtering we could not be sputtering you could not be sputtering they could not be sputtering
Perfecto	Perfecto con V-ing
I could not have sputtered you could not have sputtered he could not have sputtered we could not have sputtered you could not have sputtered they could not have sputtered	I could not have been sputtering you could not have been sputtering he could not have been sputtering we could not have been sputtering you could not have been sputtering they could not have been sputtering

Forma interrogativa

Forma simple	Forma con V-ing
could I sputter? could you sputter? could he sputter? could we sputter? could you sputter? could they sputter?	could I be sputtering? could you be sputtering? could he be sputtering? could we be sputtering? could you be sputtering? could they be sputtering?
Perfecto	Perfecto con V-ing
could I have sputtered? could you have sputtered? could he have sputtered? could we have sputtered? could you have sputtered? could they have sputtered?	could I have been sputtering? could you have been sputtering? could he have been sputtering? could we have been sputtering? could you have been sputtering? could they have been sputtering?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not sputter? could you not sputter? could he not sputter? could we not sputter? could you not sputter? could they not sputter?	could I not be sputtering? could you not be sputtering? could he not be sputtering? could we not be sputtering? could you not be sputtering? could they not be sputtering?
Perfecto	Perfecto con V-ing
could I not have sputtered? could you not have sputtered? could he not have sputtered? could we not have sputtered? could you not have sputtered? could they not have sputtered?	could I not have been sputtering? could you not have been sputtering? could he not have been sputtering? could we not have been sputtering? could you not have been sputtering? could they not have been sputtering?