English verb conjugation
MUST BACKFLIP

Regular verb: backflip - backfliped - backfliped

Affirmation

Simple form	V-ing form
I must backflip you must backflip he must backflip we must backflip you must backflip they must backflip	I must be backfliping you must be backfliping he must be backfliping we must be backfliping you must be backfliping they must be backfliping
Perfect	V-ing perfect
I must have backfliped you must have backfliped he must have backfliped we must have backfliped you must have backfliped they must have backfliped	I must have been backfliping you must have been backfliping he must have been backfliping we must have been backfliping you must have been backfliping they must have been backfliping

Negation

Simple form	V-ing form
I must not backflip you must not backflip he must not backflip we must not backflip you must not backflip they must not backflip	I must not be backfliping you must not be backfliping he must not be backfliping we must not be backfliping you must not be backfliping they must not be backfliping
Perfect	V-ing perfect
I must not have backfliped you must not have backfliped he must not have backfliped we must not have backfliped you must not have backfliped they must not have backfliped	I must not have been backfliping you must not have been backfliping he must not have been backfliping we must not have been backfliping you must not have been backfliping they must not have been backfliping

Interrogative form

Simple form	V-ing form
must I backflip? must you backflip? must he backflip? must we backflip? must you backflip? must they backflip?	must I be backfliping? must you be backfliping? must he be backfliping? must we be backfliping? must you be backfliping? must they be backfliping?
Perfect	V-ing perfect
must I have backfliped? must you have backfliped? must he have backfliped? must we have backfliped? must you have backfliped? must they have backfliped?	must I have been backfliping? must you have been backfliping? must he have been backfliping? must we have been backfliping? must you have been backfliping? must they have been backfliping?

Interro-negative form

Simple form	V-ing form
must I not backflip? must you not backflip? must he not backflip? must we not backflip? must you not backflip? must they not backflip?	must I not be backfliping? must you not be backfliping? must he not be backfliping? must we not be backfliping? must you not be backfliping? must they not be backfliping?
Perfect	V-ing perfect
must I not have backfliped? must you not have backfliped? must he not have backfliped? must we not have backfliped? must you not have backfliped? must they not have backfliped?	must I not have been backfliping? must you not have been backfliping? must he not have been backfliping? must we not have been backfliping? must you not have been backfliping? must they not have been backfliping?