Conjugación del verbo inglés
COULD PIFFLE

Verbo regular: piffle - piffled - piffled

Afirmación

Forma simple	Forma con V-ing
I could piffle you could piffle he could piffle we could piffle you could piffle they could piffle	I could be piffling you could be piffling he could be piffling we could be piffling you could be piffling they could be piffling
Perfecto	Perfecto con V-ing
I could have piffled you could have piffled he could have piffled we could have piffled you could have piffled they could have piffled	I could have been piffling you could have been piffling he could have been piffling we could have been piffling you could have been piffling they could have been piffling

Negación

Forma simple	Forma con V-ing
I couldn't piffle you couldn't piffle he couldn't piffle we couldn't piffle you couldn't piffle they couldn't piffle	I couldn't be piffling you couldn't be piffling he couldn't be piffling we couldn't be piffling you couldn't be piffling they couldn't be piffling
Perfecto	Perfecto con V-ing
I couldn't have piffled you couldn't have piffled he couldn't have piffled we couldn't have piffled you couldn't have piffled they couldn't have piffled	I couldn't have been piffling you couldn't have been piffling he couldn't have been piffling we couldn't have been piffling you couldn't have been piffling they couldn't have been piffling

Forma interrogativa

Forma simple	Forma con V-ing
could I piffle? could you piffle? could he piffle? could we piffle? could you piffle? could they piffle?	could I be piffling? could you be piffling? could he be piffling? could we be piffling? could you be piffling? could they be piffling?
Perfecto	Perfecto con V-ing
could I have piffled? could you have piffled? could he have piffled? could we have piffled? could you have piffled? could they have piffled?	could I have been piffling? could you have been piffling? could he have been piffling? could we have been piffling? could you have been piffling? could they have been piffling?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I piffle? couldn't you piffle? couldn't he piffle? couldn't we piffle? couldn't you piffle? couldn't they piffle?	couldn't I be piffling? couldn't you be piffling? couldn't he be piffling? couldn't we be piffling? couldn't you be piffling? couldn't they be piffling?
Perfecto	Perfecto con V-ing
couldn't I have piffled? couldn't you have piffled? couldn't he have piffled? couldn't we have piffled? couldn't you have piffled? couldn't they have piffled?	couldn't I have been piffling? couldn't you have been piffling? couldn't he have been piffling? couldn't we have been piffling? couldn't you have been piffling? couldn't they have been piffling?