English verb conjugation
MUST BURDEN

Regular verb: burden - burdened - burdened

Affirmation

Simple form	V-ing form
I must burden you must burden he must burden we must burden you must burden they must burden	I must be burdening you must be burdening he must be burdening we must be burdening you must be burdening they must be burdening
Perfect	V-ing perfect
I must have burdened you must have burdened he must have burdened we must have burdened you must have burdened they must have burdened	I must have been burdening you must have been burdening he must have been burdening we must have been burdening you must have been burdening they must have been burdening

Negation

Simple form	V-ing form
I mustn't burden you mustn't burden he mustn't burden we mustn't burden you mustn't burden they mustn't burden	I mustn't be burdening you mustn't be burdening he mustn't be burdening we mustn't be burdening you mustn't be burdening they mustn't be burdening
Perfect	V-ing perfect
I mustn't have burdened you mustn't have burdened he mustn't have burdened we mustn't have burdened you mustn't have burdened they mustn't have burdened	I mustn't have been burdening you mustn't have been burdening he mustn't have been burdening we mustn't have been burdening you mustn't have been burdening they mustn't have been burdening

Interrogative form

Simple form	V-ing form
must I burden? must you burden? must he burden? must we burden? must you burden? must they burden?	must I be burdening? must you be burdening? must he be burdening? must we be burdening? must you be burdening? must they be burdening?
Perfect	V-ing perfect
must I have burdened? must you have burdened? must he have burdened? must we have burdened? must you have burdened? must they have burdened?	must I have been burdening? must you have been burdening? must he have been burdening? must we have been burdening? must you have been burdening? must they have been burdening?

Interro-negative form

Simple form	V-ing form
mustn't I burden? mustn't you burden? mustn't he burden? mustn't we burden? mustn't you burden? mustn't they burden?	mustn't I be burdening? mustn't you be burdening? mustn't he be burdening? mustn't we be burdening? mustn't you be burdening? mustn't they be burdening?
Perfect	V-ing perfect
mustn't I have burdened? mustn't you have burdened? mustn't he have burdened? mustn't we have burdened? mustn't you have burdened? mustn't they have burdened?	mustn't I have been burdening? mustn't you have been burdening? mustn't he have been burdening? mustn't we have been burdening? mustn't you have been burdening? mustn't they have been burdening?