English verb conjugation
MUST UPHOLD

Irregular verb: uphold - upheld - upheld

Affirmation

Simple form	V-ing form
I must uphold you must uphold he must uphold we must uphold you must uphold they must uphold	I must be upholding you must be upholding he must be upholding we must be upholding you must be upholding they must be upholding
Perfect	V-ing perfect
I must have upheld you must have upheld he must have upheld we must have upheld you must have upheld they must have upheld	I must have been upholding you must have been upholding he must have been upholding we must have been upholding you must have been upholding they must have been upholding

Negation

Simple form	V-ing form
I must not uphold you must not uphold he must not uphold we must not uphold you must not uphold they must not uphold	I must not be upholding you must not be upholding he must not be upholding we must not be upholding you must not be upholding they must not be upholding
Perfect	V-ing perfect
I must not have upheld you must not have upheld he must not have upheld we must not have upheld you must not have upheld they must not have upheld	I must not have been upholding you must not have been upholding he must not have been upholding we must not have been upholding you must not have been upholding they must not have been upholding

Interrogative form

Simple form	V-ing form
must I uphold? must you uphold? must he uphold? must we uphold? must you uphold? must they uphold?	must I be upholding? must you be upholding? must he be upholding? must we be upholding? must you be upholding? must they be upholding?
Perfect	V-ing perfect
must I have upheld? must you have upheld? must he have upheld? must we have upheld? must you have upheld? must they have upheld?	must I have been upholding? must you have been upholding? must he have been upholding? must we have been upholding? must you have been upholding? must they have been upholding?

Interro-negative form

Simple form	V-ing form
must I not uphold? must you not uphold? must he not uphold? must we not uphold? must you not uphold? must they not uphold?	must I not be upholding? must you not be upholding? must he not be upholding? must we not be upholding? must you not be upholding? must they not be upholding?
Perfect	V-ing perfect
must I not have upheld? must you not have upheld? must he not have upheld? must we not have upheld? must you not have upheld? must they not have upheld?	must I not have been upholding? must you not have been upholding? must he not have been upholding? must we not have been upholding? must you not have been upholding? must they not have been upholding?