must sphere
Verbe régulier : sphere - sphered- sphered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must sphere
you must sphere
he must sphere
we must sphere
you must sphere
they must sphere 	I must be sphering
you must be sphering
he must be sphering
we must be sphering
you must be sphering
they must be sphering	I must have sphered
you must have sphered
he must have sphered
we must have sphered
you must have sphered
they must have sphered	I must have been sphering
you must have been sphering
he must have been sphering
we must have been sphering
you must have been sphering
they must have been sphering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't sphere
you mustn't sphere
he mustn't sphere
we mustn't sphere
you mustn't sphere
they mustn't sphere 	I mustn't be sphering
you mustn't be sphering
he mustn't be sphering
we mustn't be sphering
you mustn't be sphering
they mustn't be sphering	I mustn't have sphered
you mustn't have sphered
he mustn't have sphered
we mustn't have sphered
you mustn't have sphered
they mustn't have sphered	I mustn't have been sphering
you mustn't have been sphering
he mustn't have been sphering
we mustn't have been sphering
you mustn't have been sphering
they mustn't have been sphering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I sphere?
must you sphere?
must he sphere?
must we sphere?
must you sphere?
must they sphere? 	must I be sphering?
must you be sphering?
must he be sphering?
must we be sphering?
must you be sphering?
must they be sphering? 	must I have sphered?
must you have sphered?
must he have sphered?
must we have sphered?
must you have sphered?
must they have sphered? 	must I have been sphering?
must you have been sphering?
must he have been sphering?
must we have been sphering?
must you have been sphering?
must they have been sphering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I sphere?
mustn't you sphere?
mustn't he sphere?
mustn't we sphere?
mustn't you sphere?
mustn't they sphere? 	mustn't I be sphering?
mustn't you be sphering?
mustn't he be sphering?
mustn't we be sphering?
mustn't you be sphering?
mustn't they be sphering? 	mustn't I have sphered?
mustn't you have sphered?
mustn't he have sphered?
mustn't we have sphered?
mustn't you have sphered?
mustn't they have sphered? 	mustn't I have been sphering?
mustn't you have been sphering?
mustn't he have been sphering?
mustn't we have been sphering?
mustn't you have been sphering?
mustn't they have been sphering?