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 mustn't lower you mustn't lower he mustn't lower we mustn't lower you mustn't lower they mustn't lower	I mustn't be lowering you mustn't be lowering he mustn't be lowering we mustn't be lowering you mustn't be lowering they mustn't be lowering
Perfect	V-ing perfect
I mustn't have lowered you mustn't have lowered he mustn't have lowered we mustn't have lowered you mustn't have lowered they mustn't have lowered	I mustn't have been lowering you mustn't have been lowering he mustn't have been lowering we mustn't have been lowering you mustn't have been lowering they mustn't 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
mustn't I lower? mustn't you lower? mustn't he lower? mustn't we lower? mustn't you lower? mustn't they lower?	mustn't I be lowering? mustn't you be lowering? mustn't he be lowering? mustn't we be lowering? mustn't you be lowering? mustn't they be lowering?
Perfect	V-ing perfect
mustn't I have lowered? mustn't you have lowered? mustn't he have lowered? mustn't we have lowered? mustn't you have lowered? mustn't they have lowered?	mustn't I have been lowering? mustn't you have been lowering? mustn't he have been lowering? mustn't we have been lowering? mustn't you have been lowering? mustn't they have been lowering?