English verb conjugation
MUST ENCUMBER

Regular verb: encumber - encumbered - encumbered

Affirmation

Simple form	V-ing form
I must encumber you must encumber she must encumber we must encumber you must encumber they must encumber	I must be encumbering you must be encumbering she must be encumbering we must be encumbering you must be encumbering they must be encumbering
Perfect	V-ing perfect
I must have encumbered you must have encumbered she must have encumbered we must have encumbered you must have encumbered they must have encumbered	I must have been encumbering you must have been encumbering she must have been encumbering we must have been encumbering you must have been encumbering they must have been encumbering

Negation

Simple form	V-ing form
I mustn't encumber you mustn't encumber she mustn't encumber we mustn't encumber you mustn't encumber they mustn't encumber	I mustn't be encumbering you mustn't be encumbering she mustn't be encumbering we mustn't be encumbering you mustn't be encumbering they mustn't be encumbering
Perfect	V-ing perfect
I mustn't have encumbered you mustn't have encumbered she mustn't have encumbered we mustn't have encumbered you mustn't have encumbered they mustn't have encumbered	I mustn't have been encumbering you mustn't have been encumbering she mustn't have been encumbering we mustn't have been encumbering you mustn't have been encumbering they mustn't have been encumbering

Interrogative form

Simple form	V-ing form
must I encumber? must you encumber? must she encumber? must we encumber? must you encumber? must they encumber?	must I be encumbering? must you be encumbering? must she be encumbering? must we be encumbering? must you be encumbering? must they be encumbering?
Perfect	V-ing perfect
must I have encumbered? must you have encumbered? must she have encumbered? must we have encumbered? must you have encumbered? must they have encumbered?	must I have been encumbering? must you have been encumbering? must she have been encumbering? must we have been encumbering? must you have been encumbering? must they have been encumbering?

Interro-negative form

Simple form	V-ing form
mustn't I encumber? mustn't you encumber? mustn't she encumber? mustn't we encumber? mustn't you encumber? mustn't they encumber?	mustn't I be encumbering? mustn't you be encumbering? mustn't she be encumbering? mustn't we be encumbering? mustn't you be encumbering? mustn't they be encumbering?
Perfect	V-ing perfect
mustn't I have encumbered? mustn't you have encumbered? mustn't she have encumbered? mustn't we have encumbered? mustn't you have encumbered? mustn't they have encumbered?	mustn't I have been encumbering? mustn't you have been encumbering? mustn't she have been encumbering? mustn't we have been encumbering? mustn't you have been encumbering? mustn't they have been encumbering?