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 must not sphere you must not sphere he must not sphere we must not sphere you must not sphere they must not sphere	I must not be sphering you must not be sphering he must not be sphering we must not be sphering you must not be sphering they must not be sphering
Perfect	V-ing perfect
I must not have sphered you must not have sphered he must not have sphered we must not have sphered you must not have sphered they must not have sphered	I must not have been sphering you must not have been sphering he must not have been sphering we must not have been sphering you must not have been sphering they must not 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
must I not sphere? must you not sphere? must he not sphere? must we not sphere? must you not sphere? must they not sphere?	must I not be sphering? must you not be sphering? must he not be sphering? must we not be sphering? must you not be sphering? must they not be sphering?
Perfect	V-ing perfect
must I not have sphered? must you not have sphered? must he not have sphered? must we not have sphered? must you not have sphered? must they not have sphered?	must I not have been sphering? must you not have been sphering? must he not have been sphering? must we not have been sphering? must you not have been sphering? must they not have been sphering?