must fathom
Verbo regular: fathom - fathomed- fathomed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	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?