English verb conjugation
MUST SPEND

Irregular verb: spend - spent - spent

Affirmation

Simple form	V-ing form
I must spend you must spend he must spend we must spend you must spend they must spend	I must be spending you must be spending he must be spending we must be spending you must be spending they must be spending
Perfect	V-ing perfect
I must have spent you must have spent he must have spent we must have spent you must have spent they must have spent	I must have been spending you must have been spending he must have been spending we must have been spending you must have been spending they must have been spending

Negation

Simple form	V-ing form
I must not spend you must not spend he must not spend we must not spend you must not spend they must not spend	I must not be spending you must not be spending he must not be spending we must not be spending you must not be spending they must not be spending
Perfect	V-ing perfect
I must not have spent you must not have spent he must not have spent we must not have spent you must not have spent they must not have spent	I must not have been spending you must not have been spending he must not have been spending we must not have been spending you must not have been spending they must not have been spending

Interrogative form

Simple form	V-ing form
must I spend? must you spend? must he spend? must we spend? must you spend? must they spend?	must I be spending? must you be spending? must he be spending? must we be spending? must you be spending? must they be spending?
Perfect	V-ing perfect
must I have spent? must you have spent? must he have spent? must we have spent? must you have spent? must they have spent?	must I have been spending? must you have been spending? must he have been spending? must we have been spending? must you have been spending? must they have been spending?

Interro-negative form

Simple form	V-ing form
must I not spend? must you not spend? must he not spend? must we not spend? must you not spend? must they not spend?	must I not be spending? must you not be spending? must he not be spending? must we not be spending? must you not be spending? must they not be spending?
Perfect	V-ing perfect
must I not have spent? must you not have spent? must he not have spent? must we not have spent? must you not have spent? must they not have spent?	must I not have been spending? must you not have been spending? must he not have been spending? must we not have been spending? must you not have been spending? must they not have been spending?