English verb conjugation
MUST CONTEND

Regular verb: contend - contended - contended

Affirmation

Simple form	V-ing form
I must contend you must contend he must contend we must contend you must contend they must contend	I must be contending you must be contending he must be contending we must be contending you must be contending they must be contending
Perfect	V-ing perfect
I must have contended you must have contended he must have contended we must have contended you must have contended they must have contended	I must have been contending you must have been contending he must have been contending we must have been contending you must have been contending they must have been contending

Negation

Simple form	V-ing form
I must not contend you must not contend he must not contend we must not contend you must not contend they must not contend	I must not be contending you must not be contending he must not be contending we must not be contending you must not be contending they must not be contending
Perfect	V-ing perfect
I must not have contended you must not have contended he must not have contended we must not have contended you must not have contended they must not have contended	I must not have been contending you must not have been contending he must not have been contending we must not have been contending you must not have been contending they must not have been contending

Interrogative form

Simple form	V-ing form
must I contend? must you contend? must he contend? must we contend? must you contend? must they contend?	must I be contending? must you be contending? must he be contending? must we be contending? must you be contending? must they be contending?
Perfect	V-ing perfect
must I have contended? must you have contended? must he have contended? must we have contended? must you have contended? must they have contended?	must I have been contending? must you have been contending? must he have been contending? must we have been contending? must you have been contending? must they have been contending?

Interro-negative form

Simple form	V-ing form
must I not contend? must you not contend? must he not contend? must we not contend? must you not contend? must they not contend?	must I not be contending? must you not be contending? must he not be contending? must we not be contending? must you not be contending? must they not be contending?
Perfect	V-ing perfect
must I not have contended? must you not have contended? must he not have contended? must we not have contended? must you not have contended? must they not have contended?	must I not have been contending? must you not have been contending? must he not have been contending? must we not have been contending? must you not have been contending? must they not have been contending?