I could grease you could grease she could grease we could grease you could grease they could grease
Forma con V-ing
I could be greasing you could be greasing she could be greasing we could be greasing you could be greasing they could be greasing
Perfecto
I could have greased you could have greased she could have greased we could have greased you could have greased they could have greased
Perfecto con V-ing
I could have been greasing you could have been greasing she could have been greasing we could have been greasing you could have been greasing they could have been greasing
Negación
Forma simple
I could not grease you could not grease she could not grease we could not grease you could not grease they could not grease
Forma con V-ing
I could not be greasing you could not be greasing she could not be greasing we could not be greasing you could not be greasing they could not be greasing
Perfecto
I could not have greased you could not have greased she could not have greased we could not have greased you could not have greased they could not have greased
Perfecto con V-ing
I could not have been greasing you could not have been greasing she could not have been greasing we could not have been greasing you could not have been greasing they could not have been greasing
Forma interrogativa
Forma simple
could I grease? could you grease? could she grease? could we grease? could you grease? could they grease?
Forma con V-ing
could I be greasing? could you be greasing? could she be greasing? could we be greasing? could you be greasing? could they be greasing?
Perfecto
could I have greased? could you have greased? could she have greased? could we have greased? could you have greased? could they have greased?
Perfecto con V-ing
could I have been greasing? could you have been greasing? could she have been greasing? could we have been greasing? could you have been greasing? could they have been greasing?
Forma interro-negativa
Forma simple
could I not grease? could you not grease? could she not grease? could we not grease? could you not grease? could they not grease?
Forma con V-ing
could I not be greasing? could you not be greasing? could she not be greasing? could we not be greasing? could you not be greasing? could they not be greasing?
Perfecto
could I not have greased? could you not have greased? could she not have greased? could we not have greased? could you not have greased? could they not have greased?
Perfecto con V-ing
could I not have been greasing? could you not have been greasing? could she not have been greasing? could we not have been greasing? could you not have been greasing? could they not have been greasing?