English verb conjugation
MUST FATHOM

Regular verb: fathom - fathomed - fathomed

Affirmation

Simple form	V-ing form
I must fathom you must fathom he must fathom we must fathom you must fathom they must fathom	I must be fathoming you must be fathoming he must be fathoming we must be fathoming you must be fathoming they must be fathoming
Perfect	V-ing perfect
I must have fathomed you must have fathomed he must have fathomed we must have fathomed you must have fathomed they must have fathomed	I must have been fathoming you must have been fathoming he must have been fathoming we must have been fathoming you must have been fathoming they must have been fathoming

Negation

Simple form	V-ing form
I must not fathom you must not fathom he must not fathom we must not fathom you must not fathom they must not fathom	I must not be fathoming you must not be fathoming he must not be fathoming we must not be fathoming you must not be fathoming they must not be fathoming
Perfect	V-ing perfect
I must not have fathomed you must not have fathomed he must not have fathomed we must not have fathomed you must not have fathomed they must not have fathomed	I must not have been fathoming you must not have been fathoming he must not have been fathoming we must not have been fathoming you must not have been fathoming they must not have been fathoming

Interrogative form

Simple form	V-ing form
must I fathom? must you fathom? must he fathom? must we fathom? must you fathom? must they fathom?	must I be fathoming? must you be fathoming? must he be fathoming? must we be fathoming? must you be fathoming? must they be fathoming?
Perfect	V-ing perfect
must I have fathomed? must you have fathomed? must he have fathomed? must we have fathomed? must you have fathomed? must they have fathomed?	must I have been fathoming? must you have been fathoming? must he have been fathoming? must we have been fathoming? must you have been fathoming? must they have been fathoming?

Interro-negative form

Simple form	V-ing form
must I not fathom? must you not fathom? must he not fathom? must we not fathom? must you not fathom? must they not fathom?	must I not be fathoming? must you not be fathoming? must he not be fathoming? must we not be fathoming? must you not be fathoming? must they not be fathoming?
Perfect	V-ing perfect
must I not have fathomed? must you not have fathomed? must he not have fathomed? must we not have fathomed? must you not have fathomed? must they not have fathomed?	must I not have been fathoming? must you not have been fathoming? must he not have been fathoming? must we not have been fathoming? must you not have been fathoming? must they not have been fathoming?