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 cannot leaven
you cannot leaven
he cannot leaven
we cannot leaven
you cannot leaven
they cannot leaven 	I cannot be leavening
you cannot be leavening
he cannot be leavening
we cannot be leavening
you cannot be leavening
they cannot be leavening	I cannot have leavened
you cannot have leavened
he cannot have leavened
we cannot have leavened
you cannot have leavened
they cannot have leavened	I cannot have been leavening
you cannot have been leavening
he cannot have been leavening
we cannot have been leavening
you cannot have been leavening
they cannot 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 I not leaven?
can you not leaven?
can he not leaven?
can we not leaven?
can you not leaven?
can they not leaven? 	can I not be leavening?
can you not be leavening?
can he not be leavening?
can we not be leavening?
can you not be leavening?
can they not be leavening? 	can I not have leavened?
can you not have leavened?
can he not have leavened?
can we not have leavened?
can you not have leavened?
can they not have leavened? 	can I not have been leavening?
can you not have been leavening?
can he not have been leavening?
can we not have been leavening?
can you not have been leavening?
can they not have been leavening?