English verb conjugation
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Regular verb: worst - worsted - worsted

Affirmation

Simple form	V-ing form
I must worst you must worst he must worst we must worst you must worst they must worst	I must be worsting you must be worsting he must be worsting we must be worsting you must be worsting they must be worsting
Perfect	V-ing perfect
I must have worsted you must have worsted he must have worsted we must have worsted you must have worsted they must have worsted	I must have been worsting you must have been worsting he must have been worsting we must have been worsting you must have been worsting they must have been worsting

Negation

Simple form	V-ing form
I must not worst you must not worst he must not worst we must not worst you must not worst they must not worst	I must not be worsting you must not be worsting he must not be worsting we must not be worsting you must not be worsting they must not be worsting
Perfect	V-ing perfect
I must not have worsted you must not have worsted he must not have worsted we must not have worsted you must not have worsted they must not have worsted	I must not have been worsting you must not have been worsting he must not have been worsting we must not have been worsting you must not have been worsting they must not have been worsting

Interrogative form

Simple form	V-ing form
must I worst? must you worst? must he worst? must we worst? must you worst? must they worst?	must I be worsting? must you be worsting? must he be worsting? must we be worsting? must you be worsting? must they be worsting?
Perfect	V-ing perfect
must I have worsted? must you have worsted? must he have worsted? must we have worsted? must you have worsted? must they have worsted?	must I have been worsting? must you have been worsting? must he have been worsting? must we have been worsting? must you have been worsting? must they have been worsting?

Interro-negative form

Simple form	V-ing form
must I not worst? must you not worst? must he not worst? must we not worst? must you not worst? must they not worst?	must I not be worsting? must you not be worsting? must he not be worsting? must we not be worsting? must you not be worsting? must they not be worsting?
Perfect	V-ing perfect
must I not have worsted? must you not have worsted? must he not have worsted? must we not have worsted? must you not have worsted? must they not have worsted?	must I not have been worsting? must you not have been worsting? must he not have been worsting? must we not have been worsting? must you not have been worsting? must they not have been worsting?