I could search you could search she could search we could search you could search they could search
Forma con V-ing
I could be searching you could be searching she could be searching we could be searching you could be searching they could be searching
Perfecto
I could have searched you could have searched she could have searched we could have searched you could have searched they could have searched
Perfecto con V-ing
I could have been searching you could have been searching she could have been searching we could have been searching you could have been searching they could have been searching
Negación
Forma simple
I could not search you could not search she could not search we could not search you could not search they could not search
Forma con V-ing
I could not be searching you could not be searching she could not be searching we could not be searching you could not be searching they could not be searching
Perfecto
I could not have searched you could not have searched she could not have searched we could not have searched you could not have searched they could not have searched
Perfecto con V-ing
I could not have been searching you could not have been searching she could not have been searching we could not have been searching you could not have been searching they could not have been searching
Forma interrogativa
Forma simple
could I search? could you search? could she search? could we search? could you search? could they search?
Forma con V-ing
could I be searching? could you be searching? could she be searching? could we be searching? could you be searching? could they be searching?
Perfecto
could I have searched? could you have searched? could she have searched? could we have searched? could you have searched? could they have searched?
Perfecto con V-ing
could I have been searching? could you have been searching? could she have been searching? could we have been searching? could you have been searching? could they have been searching?
Forma interro-negativa
Forma simple
could I not search? could you not search? could she not search? could we not search? could you not search? could they not search?
Forma con V-ing
could I not be searching? could you not be searching? could she not be searching? could we not be searching? could you not be searching? could they not be searching?
Perfecto
could I not have searched? could you not have searched? could she not have searched? could we not have searched? could you not have searched? could they not have searched?
Perfecto con V-ing
could I not have been searching? could you not have been searching? could she not have been searching? could we not have been searching? could you not have been searching? could they not have been searching?