can leaven
Verbo regular: leaven - leavened- leavened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can leaven
you can leaven
he can leaven
we can leaven
you can leaven
they can leaven 	I can be leavening
you can be leavening
he can be leavening
we can be leavening
you can be leavening
they can be leavening	I can have leavened
you can have leavened
he can have leavened
we can have leavened
you can have leavened
they can have leavened	I can have been leavening
you can have been leavening
he can have been leavening
we can have been leavening
you can have been leavening
they can have been leavening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't leaven
you can't leaven
he can't leaven
we can't leaven
you can't leaven
they can't leaven 	I can't be leavening
you can't be leavening
he can't be leavening
we can't be leavening
you can't be leavening
they can't be leavening	I can't have leavened
you can't have leavened
he can't have leavened
we can't have leavened
you can't have leavened
they can't have leavened	I can't have been leavening
you can't have been leavening
he can't have been leavening
we can't have been leavening
you can't have been leavening
they can't have been leavening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I leaven?
can you leaven?
can he leaven?
can we leaven?
can you leaven?
can they leaven? 	can I be leavening?
can you be leavening?
can he be leavening?
can we be leavening?
can you be leavening?
can they be leavening? 	can I have leavened?
can you have leavened?
can he have leavened?
can we have leavened?
can you have leavened?
can they have leavened? 	can I have been leavening?
can you have been leavening?
can he have been leavening?
can we have been leavening?
can you have been leavening?
can they have been leavening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I leaven?
can't you leaven?
can't he leaven?
can't we leaven?
can't you leaven?
can't they leaven? 	can't I be leavening?
can't you be leavening?
can't he be leavening?
can't we be leavening?
can't you be leavening?
can't they be leavening? 	can't I have leavened?
can't you have leavened?
can't he have leavened?
can't we have leavened?
can't you have leavened?
can't they have leavened? 	can't I have been leavening?
can't you have been leavening?
can't he have been leavening?
can't we have been leavening?
can't you have been leavening?
can't they have been leavening?