I could define you could define he could define we could define you could define they could define
Forma con V-ing
I could be defining you could be defining he could be defining we could be defining you could be defining they could be defining
Perfecto
I could have defined you could have defined he could have defined we could have defined you could have defined they could have defined
Perfecto con V-ing
I could have been defining you could have been defining he could have been defining we could have been defining you could have been defining they could have been defining
Negación
Forma simple
I couldn't define you couldn't define he couldn't define we couldn't define you couldn't define they couldn't define
Forma con V-ing
I couldn't be defining you couldn't be defining he couldn't be defining we couldn't be defining you couldn't be defining they couldn't be defining
Perfecto
I couldn't have defined you couldn't have defined he couldn't have defined we couldn't have defined you couldn't have defined they couldn't have defined
Perfecto con V-ing
I couldn't have been defining you couldn't have been defining he couldn't have been defining we couldn't have been defining you couldn't have been defining they couldn't have been defining
Forma interrogativa
Forma simple
could I define? could you define? could he define? could we define? could you define? could they define?
Forma con V-ing
could I be defining? could you be defining? could he be defining? could we be defining? could you be defining? could they be defining?
Perfecto
could I have defined? could you have defined? could he have defined? could we have defined? could you have defined? could they have defined?
Perfecto con V-ing
could I have been defining? could you have been defining? could he have been defining? could we have been defining? could you have been defining? could they have been defining?
Forma interro-negativa
Forma simple
couldn't I define? couldn't you define? couldn't he define? couldn't we define? couldn't you define? couldn't they define?
Forma con V-ing
couldn't I be defining? couldn't you be defining? couldn't he be defining? couldn't we be defining? couldn't you be defining? couldn't they be defining?
Perfecto
couldn't I have defined? couldn't you have defined? couldn't he have defined? couldn't we have defined? couldn't you have defined? couldn't they have defined?
Perfecto con V-ing
couldn't I have been defining? couldn't you have been defining? couldn't he have been defining? couldn't we have been defining? couldn't you have been defining? couldn't they have been defining?