English verb conjugation
MUST ENCUMBER

Regular verb: encumber - encumbered - encumbered

Affirmation

Simple form	V-ing form
I must encumber you must encumber he must encumber we must encumber you must encumber they must encumber	I must be encumbering you must be encumbering he 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 he 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 he 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 must not encumber you must not encumber he must not encumber we must not encumber you must not encumber they must not encumber	I must not be encumbering you must not be encumbering he must not be encumbering we must not be encumbering you must not be encumbering they must not be encumbering
Perfect	V-ing perfect
I must not have encumbered you must not have encumbered he must not have encumbered we must not have encumbered you must not have encumbered they must not have encumbered	I must not have been encumbering you must not have been encumbering he must not have been encumbering we must not have been encumbering you must not have been encumbering they must not have been encumbering

Interrogative form

Simple form	V-ing form
must I encumber? must you encumber? must he encumber? must we encumber? must you encumber? must they encumber?	must I be encumbering? must you be encumbering? must he 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 he 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 he 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
must I not encumber? must you not encumber? must he not encumber? must we not encumber? must you not encumber? must they not encumber?	must I not be encumbering? must you not be encumbering? must he not be encumbering? must we not be encumbering? must you not be encumbering? must they not be encumbering?
Perfect	V-ing perfect
must I not have encumbered? must you not have encumbered? must he not have encumbered? must we not have encumbered? must you not have encumbered? must they not have encumbered?	must I not have been encumbering? must you not have been encumbering? must he not have been encumbering? must we not have been encumbering? must you not have been encumbering? must they not have been encumbering?