I could omit you could omit he could omit we could omit you could omit they could omit
Forma con V-ing
I could be omitting you could be omitting he could be omitting we could be omitting you could be omitting they could be omitting
Perfecto
I could have omitted you could have omitted he could have omitted we could have omitted you could have omitted they could have omitted
Perfecto con V-ing
I could have been omitting you could have been omitting he could have been omitting we could have been omitting you could have been omitting they could have been omitting
Negación
Forma simple
I could not omit you could not omit he could not omit we could not omit you could not omit they could not omit
Forma con V-ing
I could not be omitting you could not be omitting he could not be omitting we could not be omitting you could not be omitting they could not be omitting
Perfecto
I could not have omitted you could not have omitted he could not have omitted we could not have omitted you could not have omitted they could not have omitted
Perfecto con V-ing
I could not have been omitting you could not have been omitting he could not have been omitting we could not have been omitting you could not have been omitting they could not have been omitting
Forma interrogativa
Forma simple
could I omit? could you omit? could he omit? could we omit? could you omit? could they omit?
Forma con V-ing
could I be omitting? could you be omitting? could he be omitting? could we be omitting? could you be omitting? could they be omitting?
Perfecto
could I have omitted? could you have omitted? could he have omitted? could we have omitted? could you have omitted? could they have omitted?
Perfecto con V-ing
could I have been omitting? could you have been omitting? could he have been omitting? could we have been omitting? could you have been omitting? could they have been omitting?
Forma interro-negativa
Forma simple
could I not omit? could you not omit? could he not omit? could we not omit? could you not omit? could they not omit?
Forma con V-ing
could I not be omitting? could you not be omitting? could he not be omitting? could we not be omitting? could you not be omitting? could they not be omitting?
Perfecto
could I not have omitted? could you not have omitted? could he not have omitted? could we not have omitted? could you not have omitted? could they not have omitted?
Perfecto con V-ing
could I not have been omitting? could you not have been omitting? could he not have been omitting? could we not have been omitting? could you not have been omitting? could they not have been omitting?