must sheave
Verbo regular: sheave - sheaved- sheaved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must sheave
you must sheave
he must sheave
we must sheave
you must sheave
they must sheave 	I must be sheaving
you must be sheaving
he must be sheaving
we must be sheaving
you must be sheaving
they must be sheaving	I must have sheaved
you must have sheaved
he must have sheaved
we must have sheaved
you must have sheaved
they must have sheaved	I must have been sheaving
you must have been sheaving
he must have been sheaving
we must have been sheaving
you must have been sheaving
they must have been sheaving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not sheave
you must not sheave
he must not sheave
we must not sheave
you must not sheave
they must not sheave 	I must not be sheaving
you must not be sheaving
he must not be sheaving
we must not be sheaving
you must not be sheaving
they must not be sheaving	I must not have sheaved
you must not have sheaved
he must not have sheaved
we must not have sheaved
you must not have sheaved
they must not have sheaved	I must not have been sheaving
you must not have been sheaving
he must not have been sheaving
we must not have been sheaving
you must not have been sheaving
they must not have been sheaving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I sheave?
must you sheave?
must he sheave?
must we sheave?
must you sheave?
must they sheave? 	must I be sheaving?
must you be sheaving?
must he be sheaving?
must we be sheaving?
must you be sheaving?
must they be sheaving? 	must I have sheaved?
must you have sheaved?
must he have sheaved?
must we have sheaved?
must you have sheaved?
must they have sheaved? 	must I have been sheaving?
must you have been sheaving?
must he have been sheaving?
must we have been sheaving?
must you have been sheaving?
must they have been sheaving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not sheave?
must you not sheave?
must he not sheave?
must we not sheave?
must you not sheave?
must they not sheave? 	must I not be sheaving?
must you not be sheaving?
must he not be sheaving?
must we not be sheaving?
must you not be sheaving?
must they not be sheaving? 	must I not have sheaved?
must you not have sheaved?
must he not have sheaved?
must we not have sheaved?
must you not have sheaved?
must they not have sheaved? 	must I not have been sheaving?
must you not have been sheaving?
must he not have been sheaving?
must we not have been sheaving?
must you not have been sheaving?
must they not have been sheaving?