could haven
Verbo regular: haven - havened- havened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could haven
you could haven
she could haven
we could haven
you could haven
they could haven 	I could be havening
you could be havening
she could be havening
we could be havening
you could be havening
they could be havening	I could have havened
you could have havened
she could have havened
we could have havened
you could have havened
they could have havened	I could have been havening
you could have been havening
she could have been havening
we could have been havening
you could have been havening
they could have been havening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't haven
you couldn't haven
she couldn't haven
we couldn't haven
you couldn't haven
they couldn't haven 	I couldn't be havening
you couldn't be havening
she couldn't be havening
we couldn't be havening
you couldn't be havening
they couldn't be havening	I couldn't have havened
you couldn't have havened
she couldn't have havened
we couldn't have havened
you couldn't have havened
they couldn't have havened	I couldn't have been havening
you couldn't have been havening
she couldn't have been havening
we couldn't have been havening
you couldn't have been havening
they couldn't have been havening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I haven?
could you haven?
could she haven?
could we haven?
could you haven?
could they haven? 	could I be havening?
could you be havening?
could she be havening?
could we be havening?
could you be havening?
could they be havening? 	could I have havened?
could you have havened?
could she have havened?
could we have havened?
could you have havened?
could they have havened? 	could I have been havening?
could you have been havening?
could she have been havening?
could we have been havening?
could you have been havening?
could they have been havening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I haven?
couldn't you haven?
couldn't she haven?
couldn't we haven?
couldn't you haven?
couldn't they haven? 	couldn't I be havening?
couldn't you be havening?
couldn't she be havening?
couldn't we be havening?
couldn't you be havening?
couldn't they be havening? 	couldn't I have havened?
couldn't you have havened?
couldn't she have havened?
couldn't we have havened?
couldn't you have havened?
couldn't they have havened? 	couldn't I have been havening?
couldn't you have been havening?
couldn't she have been havening?
couldn't we have been havening?
couldn't you have been havening?
couldn't they have been havening?