Conjugación del verbo inglés
COULD UPTURN

Verbo regular: upturn - upturned - upturned

Afirmación

Forma simple	Forma con V-ing
I could upturn you could upturn he could upturn we could upturn you could upturn they could upturn	I could be upturning you could be upturning he could be upturning we could be upturning you could be upturning they could be upturning
Perfecto	Perfecto con V-ing
I could have upturned you could have upturned he could have upturned we could have upturned you could have upturned they could have upturned	I could have been upturning you could have been upturning he could have been upturning we could have been upturning you could have been upturning they could have been upturning

Negación

Forma simple	Forma con V-ing
I couldn't upturn you couldn't upturn he couldn't upturn we couldn't upturn you couldn't upturn they couldn't upturn	I couldn't be upturning you couldn't be upturning he couldn't be upturning we couldn't be upturning you couldn't be upturning they couldn't be upturning
Perfecto	Perfecto con V-ing
I couldn't have upturned you couldn't have upturned he couldn't have upturned we couldn't have upturned you couldn't have upturned they couldn't have upturned	I couldn't have been upturning you couldn't have been upturning he couldn't have been upturning we couldn't have been upturning you couldn't have been upturning they couldn't have been upturning

Forma interrogativa

Forma simple	Forma con V-ing
could I upturn? could you upturn? could he upturn? could we upturn? could you upturn? could they upturn?	could I be upturning? could you be upturning? could he be upturning? could we be upturning? could you be upturning? could they be upturning?
Perfecto	Perfecto con V-ing
could I have upturned? could you have upturned? could he have upturned? could we have upturned? could you have upturned? could they have upturned?	could I have been upturning? could you have been upturning? could he have been upturning? could we have been upturning? could you have been upturning? could they have been upturning?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I upturn? couldn't you upturn? couldn't he upturn? couldn't we upturn? couldn't you upturn? couldn't they upturn?	couldn't I be upturning? couldn't you be upturning? couldn't he be upturning? couldn't we be upturning? couldn't you be upturning? couldn't they be upturning?
Perfecto	Perfecto con V-ing
couldn't I have upturned? couldn't you have upturned? couldn't he have upturned? couldn't we have upturned? couldn't you have upturned? couldn't they have upturned?	couldn't I have been upturning? couldn't you have been upturning? couldn't he have been upturning? couldn't we have been upturning? couldn't you have been upturning? couldn't they have been upturning?