could leaf
Verbo regular: leaf - leafed- leafed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could leaf
you could leaf
she could leaf
we could leaf
you could leaf
they could leaf 	I could be leafing
you could be leafing
she could be leafing
we could be leafing
you could be leafing
they could be leafing	I could have leafed
you could have leafed
she could have leafed
we could have leafed
you could have leafed
they could have leafed	I could have been leafing
you could have been leafing
she could have been leafing
we could have been leafing
you could have been leafing
they could have been leafing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not leaf
you could not leaf
she could not leaf
we could not leaf
you could not leaf
they could not leaf 	I could not be leafing
you could not be leafing
she could not be leafing
we could not be leafing
you could not be leafing
they could not be leafing	I could not have leafed
you could not have leafed
she could not have leafed
we could not have leafed
you could not have leafed
they could not have leafed	I could not have been leafing
you could not have been leafing
she could not have been leafing
we could not have been leafing
you could not have been leafing
they could not have been leafing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I leaf?
could you leaf?
could she leaf?
could we leaf?
could you leaf?
could they leaf? 	could I be leafing?
could you be leafing?
could she be leafing?
could we be leafing?
could you be leafing?
could they be leafing? 	could I have leafed?
could you have leafed?
could she have leafed?
could we have leafed?
could you have leafed?
could they have leafed? 	could I have been leafing?
could you have been leafing?
could she have been leafing?
could we have been leafing?
could you have been leafing?
could they have been leafing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not leaf?
could you not leaf?
could she not leaf?
could we not leaf?
could you not leaf?
could they not leaf? 	could I not be leafing?
could you not be leafing?
could she not be leafing?
could we not be leafing?
could you not be leafing?
could they not be leafing? 	could I not have leafed?
could you not have leafed?
could she not have leafed?
could we not have leafed?
could you not have leafed?
could they not have leafed? 	could I not have been leafing?
could you not have been leafing?
could she not have been leafing?
could we not have been leafing?
could you not have been leafing?
could they not have been leafing?