English verb conjugation
MUST ORBIT

Regular verb: orbit - orbited - orbited

Affirmation

Simple form	V-ing form
I must orbit you must orbit he must orbit we must orbit you must orbit they must orbit	I must be orbiting you must be orbiting he must be orbiting we must be orbiting you must be orbiting they must be orbiting
Perfect	V-ing perfect
I must have orbited you must have orbited he must have orbited we must have orbited you must have orbited they must have orbited	I must have been orbiting you must have been orbiting he must have been orbiting we must have been orbiting you must have been orbiting they must have been orbiting

Negation

Simple form	V-ing form
I must not orbit you must not orbit he must not orbit we must not orbit you must not orbit they must not orbit	I must not be orbiting you must not be orbiting he must not be orbiting we must not be orbiting you must not be orbiting they must not be orbiting
Perfect	V-ing perfect
I must not have orbited you must not have orbited he must not have orbited we must not have orbited you must not have orbited they must not have orbited	I must not have been orbiting you must not have been orbiting he must not have been orbiting we must not have been orbiting you must not have been orbiting they must not have been orbiting

Interrogative form

Simple form	V-ing form
must I orbit? must you orbit? must he orbit? must we orbit? must you orbit? must they orbit?	must I be orbiting? must you be orbiting? must he be orbiting? must we be orbiting? must you be orbiting? must they be orbiting?
Perfect	V-ing perfect
must I have orbited? must you have orbited? must he have orbited? must we have orbited? must you have orbited? must they have orbited?	must I have been orbiting? must you have been orbiting? must he have been orbiting? must we have been orbiting? must you have been orbiting? must they have been orbiting?

Interro-negative form

Simple form	V-ing form
must I not orbit? must you not orbit? must he not orbit? must we not orbit? must you not orbit? must they not orbit?	must I not be orbiting? must you not be orbiting? must he not be orbiting? must we not be orbiting? must you not be orbiting? must they not be orbiting?
Perfect	V-ing perfect
must I not have orbited? must you not have orbited? must he not have orbited? must we not have orbited? must you not have orbited? must they not have orbited?	must I not have been orbiting? must you not have been orbiting? must he not have been orbiting? must we not have been orbiting? must you not have been orbiting? must they not have been orbiting?