English verb conjugation
MUST UPEND

Regular verb: upend - upended - upended

Affirmation

Simple form	V-ing form
I must upend you must upend he must upend we must upend you must upend they must upend	I must be upending you must be upending he must be upending we must be upending you must be upending they must be upending
Perfect	V-ing perfect
I must have upended you must have upended he must have upended we must have upended you must have upended they must have upended	I must have been upending you must have been upending he must have been upending we must have been upending you must have been upending they must have been upending

Negation

Simple form	V-ing form
I must not upend you must not upend he must not upend we must not upend you must not upend they must not upend	I must not be upending you must not be upending he must not be upending we must not be upending you must not be upending they must not be upending
Perfect	V-ing perfect
I must not have upended you must not have upended he must not have upended we must not have upended you must not have upended they must not have upended	I must not have been upending you must not have been upending he must not have been upending we must not have been upending you must not have been upending they must not have been upending

Interrogative form

Simple form	V-ing form
must I upend? must you upend? must he upend? must we upend? must you upend? must they upend?	must I be upending? must you be upending? must he be upending? must we be upending? must you be upending? must they be upending?
Perfect	V-ing perfect
must I have upended? must you have upended? must he have upended? must we have upended? must you have upended? must they have upended?	must I have been upending? must you have been upending? must he have been upending? must we have been upending? must you have been upending? must they have been upending?

Interro-negative form

Simple form	V-ing form
must I not upend? must you not upend? must he not upend? must we not upend? must you not upend? must they not upend?	must I not be upending? must you not be upending? must he not be upending? must we not be upending? must you not be upending? must they not be upending?
Perfect	V-ing perfect
must I not have upended? must you not have upended? must he not have upended? must we not have upended? must you not have upended? must they not have upended?	must I not have been upending? must you not have been upending? must he not have been upending? must we not have been upending? must you not have been upending? must they not have been upending?