English verb conjugation
MUST SPHERE

Regular verb: sphere - sphered - sphered

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?