English verb conjugation
MUST SPIN

Irregular verb: spin - spun - spun

Affirmation

Simple form	V-ing form
I must spin you must spin he must spin we must spin you must spin they must spin	I must be spinning you must be spinning he must be spinning we must be spinning you must be spinning they must be spinning
Perfect	V-ing perfect
I must have spun you must have spun he must have spun we must have spun you must have spun they must have spun	I must have been spinning you must have been spinning he must have been spinning we must have been spinning you must have been spinning they must have been spinning

Negation

Simple form	V-ing form
I must not spin you must not spin he must not spin we must not spin you must not spin they must not spin	I must not be spinning you must not be spinning he must not be spinning we must not be spinning you must not be spinning they must not be spinning
Perfect	V-ing perfect
I must not have spun you must not have spun he must not have spun we must not have spun you must not have spun they must not have spun	I must not have been spinning you must not have been spinning he must not have been spinning we must not have been spinning you must not have been spinning they must not have been spinning

Interrogative form

Simple form	V-ing form
must I spin? must you spin? must he spin? must we spin? must you spin? must they spin?	must I be spinning? must you be spinning? must he be spinning? must we be spinning? must you be spinning? must they be spinning?
Perfect	V-ing perfect
must I have spun? must you have spun? must he have spun? must we have spun? must you have spun? must they have spun?	must I have been spinning? must you have been spinning? must he have been spinning? must we have been spinning? must you have been spinning? must they have been spinning?

Interro-negative form

Simple form	V-ing form
must I not spin? must you not spin? must he not spin? must we not spin? must you not spin? must they not spin?	must I not be spinning? must you not be spinning? must he not be spinning? must we not be spinning? must you not be spinning? must they not be spinning?
Perfect	V-ing perfect
must I not have spun? must you not have spun? must he not have spun? must we not have spun? must you not have spun? must they not have spun?	must I not have been spinning? must you not have been spinning? must he not have been spinning? must we not have been spinning? must you not have been spinning? must they not have been spinning?