I could excel you could excel she could excel we could excel you could excel they could excel
Forma con V-ing
I could be excelling you could be excelling she could be excelling we could be excelling you could be excelling they could be excelling
Perfecto
I could have excelled you could have excelled she could have excelled we could have excelled you could have excelled they could have excelled
Perfecto con V-ing
I could have been excelling you could have been excelling she could have been excelling we could have been excelling you could have been excelling they could have been excelling
Negación
Forma simple
I couldn't excel you couldn't excel she couldn't excel we couldn't excel you couldn't excel they couldn't excel
Forma con V-ing
I couldn't be excelling you couldn't be excelling she couldn't be excelling we couldn't be excelling you couldn't be excelling they couldn't be excelling
Perfecto
I couldn't have excelled you couldn't have excelled she couldn't have excelled we couldn't have excelled you couldn't have excelled they couldn't have excelled
Perfecto con V-ing
I couldn't have been excelling you couldn't have been excelling she couldn't have been excelling we couldn't have been excelling you couldn't have been excelling they couldn't have been excelling
Forma interrogativa
Forma simple
could I excel? could you excel? could she excel? could we excel? could you excel? could they excel?
Forma con V-ing
could I be excelling? could you be excelling? could she be excelling? could we be excelling? could you be excelling? could they be excelling?
Perfecto
could I have excelled? could you have excelled? could she have excelled? could we have excelled? could you have excelled? could they have excelled?
Perfecto con V-ing
could I have been excelling? could you have been excelling? could she have been excelling? could we have been excelling? could you have been excelling? could they have been excelling?
Forma interro-negativa
Forma simple
couldn't I excel? couldn't you excel? couldn't she excel? couldn't we excel? couldn't you excel? couldn't they excel?
Forma con V-ing
couldn't I be excelling? couldn't you be excelling? couldn't she be excelling? couldn't we be excelling? couldn't you be excelling? couldn't they be excelling?
Perfecto
couldn't I have excelled? couldn't you have excelled? couldn't she have excelled? couldn't we have excelled? couldn't you have excelled? couldn't they have excelled?
Perfecto con V-ing
couldn't I have been excelling? couldn't you have been excelling? couldn't she have been excelling? couldn't we have been excelling? couldn't you have been excelling? couldn't they have been excelling?