English verb conjugation
MUST INCUR

Regular verb: incur - incurred - incurred

Affirmation

Simple form	V-ing form
I must incur you must incur he must incur we must incur you must incur they must incur	I must be incurring you must be incurring he must be incurring we must be incurring you must be incurring they must be incurring
Perfect	V-ing perfect
I must have incurred you must have incurred he must have incurred we must have incurred you must have incurred they must have incurred	I must have been incurring you must have been incurring he must have been incurring we must have been incurring you must have been incurring they must have been incurring

Negation

Simple form	V-ing form
I must not incur you must not incur he must not incur we must not incur you must not incur they must not incur	I must not be incurring you must not be incurring he must not be incurring we must not be incurring you must not be incurring they must not be incurring
Perfect	V-ing perfect
I must not have incurred you must not have incurred he must not have incurred we must not have incurred you must not have incurred they must not have incurred	I must not have been incurring you must not have been incurring he must not have been incurring we must not have been incurring you must not have been incurring they must not have been incurring

Interrogative form

Simple form	V-ing form
must I incur? must you incur? must he incur? must we incur? must you incur? must they incur?	must I be incurring? must you be incurring? must he be incurring? must we be incurring? must you be incurring? must they be incurring?
Perfect	V-ing perfect
must I have incurred? must you have incurred? must he have incurred? must we have incurred? must you have incurred? must they have incurred?	must I have been incurring? must you have been incurring? must he have been incurring? must we have been incurring? must you have been incurring? must they have been incurring?

Interro-negative form

Simple form	V-ing form
must I not incur? must you not incur? must he not incur? must we not incur? must you not incur? must they not incur?	must I not be incurring? must you not be incurring? must he not be incurring? must we not be incurring? must you not be incurring? must they not be incurring?
Perfect	V-ing perfect
must I not have incurred? must you not have incurred? must he not have incurred? must we not have incurred? must you not have incurred? must they not have incurred?	must I not have been incurring? must you not have been incurring? must he not have been incurring? must we not have been incurring? must you not have been incurring? must they not have been incurring?