Conjugación del verbo inglés
COULD STIFLE

Verbo regular: stifle - stifled - stifled

Afirmación

Forma simple	Forma con V-ing
I could stifle you could stifle he could stifle we could stifle you could stifle they could stifle	I could be stifling you could be stifling he could be stifling we could be stifling you could be stifling they could be stifling
Perfecto	Perfecto con V-ing
I could have stifled you could have stifled he could have stifled we could have stifled you could have stifled they could have stifled	I could have been stifling you could have been stifling he could have been stifling we could have been stifling you could have been stifling they could have been stifling

Negación

Forma simple	Forma con V-ing
I could not stifle you could not stifle he could not stifle we could not stifle you could not stifle they could not stifle	I could not be stifling you could not be stifling he could not be stifling we could not be stifling you could not be stifling they could not be stifling
Perfecto	Perfecto con V-ing
I could not have stifled you could not have stifled he could not have stifled we could not have stifled you could not have stifled they could not have stifled	I could not have been stifling you could not have been stifling he could not have been stifling we could not have been stifling you could not have been stifling they could not have been stifling

Forma interrogativa

Forma simple	Forma con V-ing
could I stifle? could you stifle? could he stifle? could we stifle? could you stifle? could they stifle?	could I be stifling? could you be stifling? could he be stifling? could we be stifling? could you be stifling? could they be stifling?
Perfecto	Perfecto con V-ing
could I have stifled? could you have stifled? could he have stifled? could we have stifled? could you have stifled? could they have stifled?	could I have been stifling? could you have been stifling? could he have been stifling? could we have been stifling? could you have been stifling? could they have been stifling?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not stifle? could you not stifle? could he not stifle? could we not stifle? could you not stifle? could they not stifle?	could I not be stifling? could you not be stifling? could he not be stifling? could we not be stifling? could you not be stifling? could they not be stifling?
Perfecto	Perfecto con V-ing
could I not have stifled? could you not have stifled? could he not have stifled? could we not have stifled? could you not have stifled? could they not have stifled?	could I not have been stifling? could you not have been stifling? could he not have been stifling? could we not have been stifling? could you not have been stifling? could they not have been stifling?