English verb conjugation
MUST SAP

Regular verb: sap - sapped - sapped

Affirmation

Simple form	V-ing form
I must sap you must sap he must sap we must sap you must sap they must sap	I must be sapping you must be sapping he must be sapping we must be sapping you must be sapping they must be sapping
Perfect	V-ing perfect
I must have sapped you must have sapped he must have sapped we must have sapped you must have sapped they must have sapped	I must have been sapping you must have been sapping he must have been sapping we must have been sapping you must have been sapping they must have been sapping

Negation

Simple form	V-ing form
I must not sap you must not sap he must not sap we must not sap you must not sap they must not sap	I must not be sapping you must not be sapping he must not be sapping we must not be sapping you must not be sapping they must not be sapping
Perfect	V-ing perfect
I must not have sapped you must not have sapped he must not have sapped we must not have sapped you must not have sapped they must not have sapped	I must not have been sapping you must not have been sapping he must not have been sapping we must not have been sapping you must not have been sapping they must not have been sapping

Interrogative form

Simple form	V-ing form
must I sap? must you sap? must he sap? must we sap? must you sap? must they sap?	must I be sapping? must you be sapping? must he be sapping? must we be sapping? must you be sapping? must they be sapping?
Perfect	V-ing perfect
must I have sapped? must you have sapped? must he have sapped? must we have sapped? must you have sapped? must they have sapped?	must I have been sapping? must you have been sapping? must he have been sapping? must we have been sapping? must you have been sapping? must they have been sapping?

Interro-negative form

Simple form	V-ing form
must I not sap? must you not sap? must he not sap? must we not sap? must you not sap? must they not sap?	must I not be sapping? must you not be sapping? must he not be sapping? must we not be sapping? must you not be sapping? must they not be sapping?
Perfect	V-ing perfect
must I not have sapped? must you not have sapped? must he not have sapped? must we not have sapped? must you not have sapped? must they not have sapped?	must I not have been sapping? must you not have been sapping? must he not have been sapping? must we not have been sapping? must you not have been sapping? must they not have been sapping?