must heave
Verbo irregular: heave - heaved, hove- heaved, hove

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must heave
you must heave
he must heave
we must heave
you must heave
they must heave 	I must be heaving
you must be heaving
he must be heaving
we must be heaving
you must be heaving
they must be heaving	I must have heaved, hove
you must have heaved, hove
he must have heaved, hove
we must have heaved, hove
you must have heaved, hove
they must have heaved, hove	I must have been heaving
you must have been heaving
he must have been heaving
we must have been heaving
you must have been heaving
they must have been heaving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't heave
you mustn't heave
he mustn't heave
we mustn't heave
you mustn't heave
they mustn't heave 	I mustn't be heaving
you mustn't be heaving
he mustn't be heaving
we mustn't be heaving
you mustn't be heaving
they mustn't be heaving	I mustn't have heaved, hove
you mustn't have heaved, hove
he mustn't have heaved, hove
we mustn't have heaved, hove
you mustn't have heaved, hove
they mustn't have heaved, hove	I mustn't have been heaving
you mustn't have been heaving
he mustn't have been heaving
we mustn't have been heaving
you mustn't have been heaving
they mustn't have been heaving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I heave?
must you heave?
must he heave?
must we heave?
must you heave?
must they heave? 	must I be heaving?
must you be heaving?
must he be heaving?
must we be heaving?
must you be heaving?
must they be heaving? 	must I have heaved, hove?
must you have heaved, hove?
must he have heaved, hove?
must we have heaved, hove?
must you have heaved, hove?
must they have heaved, hove? 	must I have been heaving?
must you have been heaving?
must he have been heaving?
must we have been heaving?
must you have been heaving?
must they have been heaving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I heave?
mustn't you heave?
mustn't he heave?
mustn't we heave?
mustn't you heave?
mustn't they heave? 	mustn't I be heaving?
mustn't you be heaving?
mustn't he be heaving?
mustn't we be heaving?
mustn't you be heaving?
mustn't they be heaving? 	mustn't I have heaved, hove?
mustn't you have heaved, hove?
mustn't he have heaved, hove?
mustn't we have heaved, hove?
mustn't you have heaved, hove?
mustn't they have heaved, hove? 	mustn't I have been heaving?
mustn't you have been heaving?
mustn't he have been heaving?
mustn't we have been heaving?
mustn't you have been heaving?
mustn't they have been heaving?