English verb conjugation
MUST LOWER

Regular verb: lower - lowered - lowered

Affirmation

Simple form	V-ing form
I must lower you must lower he must lower we must lower you must lower they must lower	I must be lowering you must be lowering he must be lowering we must be lowering you must be lowering they must be lowering
Perfect	V-ing perfect
I must have lowered you must have lowered he must have lowered we must have lowered you must have lowered they must have lowered	I must have been lowering you must have been lowering he must have been lowering we must have been lowering you must have been lowering they must have been lowering

Negation

Simple form	V-ing form
I must not lower you must not lower he must not lower we must not lower you must not lower they must not lower	I must not be lowering you must not be lowering he must not be lowering we must not be lowering you must not be lowering they must not be lowering
Perfect	V-ing perfect
I must not have lowered you must not have lowered he must not have lowered we must not have lowered you must not have lowered they must not have lowered	I must not have been lowering you must not have been lowering he must not have been lowering we must not have been lowering you must not have been lowering they must not have been lowering

Interrogative form

Simple form	V-ing form
must I lower? must you lower? must he lower? must we lower? must you lower? must they lower?	must I be lowering? must you be lowering? must he be lowering? must we be lowering? must you be lowering? must they be lowering?
Perfect	V-ing perfect
must I have lowered? must you have lowered? must he have lowered? must we have lowered? must you have lowered? must they have lowered?	must I have been lowering? must you have been lowering? must he have been lowering? must we have been lowering? must you have been lowering? must they have been lowering?

Interro-negative form

Simple form	V-ing form
must I not lower? must you not lower? must he not lower? must we not lower? must you not lower? must they not lower?	must I not be lowering? must you not be lowering? must he not be lowering? must we not be lowering? must you not be lowering? must they not be lowering?
Perfect	V-ing perfect
must I not have lowered? must you not have lowered? must he not have lowered? must we not have lowered? must you not have lowered? must they not have lowered?	must I not have been lowering? must you not have been lowering? must he not have been lowering? must we not have been lowering? must you not have been lowering? must they not have been lowering?