could excel
Verbo regular: excel - excelled- excelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could excel
you could excel
he could excel
we could excel
you could excel
they could excel 	I could be excelling
you could be excelling
he could be excelling
we could be excelling
you could be excelling
they could be excelling	I could have excelled
you could have excelled
he could have excelled
we could have excelled
you could have excelled
they could have excelled	I could have been excelling
you could have been excelling
he could have been excelling
we could have been excelling
you could have been excelling
they could have been excelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't excel
you couldn't excel
he couldn't excel
we couldn't excel
you couldn't excel
they couldn't excel 	I couldn't be excelling
you couldn't be excelling
he couldn't be excelling
we couldn't be excelling
you couldn't be excelling
they couldn't be excelling	I couldn't have excelled
you couldn't have excelled
he couldn't have excelled
we couldn't have excelled
you couldn't have excelled
they couldn't have excelled	I couldn't have been excelling
you couldn't have been excelling
he 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 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I excel?
could you excel?
could he excel?
could we excel?
could you excel?
could they excel? 	could I be excelling?
could you be excelling?
could he be excelling?
could we be excelling?
could you be excelling?
could they be excelling? 	could I have excelled?
could you have excelled?
could he have excelled?
could we have excelled?
could you have excelled?
could they have excelled? 	could I have been excelling?
could you have been excelling?
could he have been excelling?
could we have been excelling?
could you have been excelling?
could they have been excelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I excel?
couldn't you excel?
couldn't he excel?
couldn't we excel?
couldn't you excel?
couldn't they excel? 	couldn't I be excelling?
couldn't you be excelling?
couldn't he be excelling?
couldn't we be excelling?
couldn't you be excelling?
couldn't they be excelling? 	couldn't I have excelled?
couldn't you have excelled?
couldn't he have excelled?
couldn't we have excelled?
couldn't you have excelled?
couldn't they have excelled? 	couldn't I have been excelling?
couldn't you have been excelling?
couldn't he have been excelling?
couldn't we have been excelling?
couldn't you have been excelling?
couldn't they have been excelling?