shall fathom
Regular verb: fathom - fathomed- fathomed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't fathom
you shan't fathom
he shan't fathom
we shan't fathom
you shan't fathom
they shan't fathom 	I shan't be fathoming
you shan't be fathoming
he shan't be fathoming
we shan't be fathoming
you shan't be fathoming
they shan't be fathoming	I shan't have fathomed
you shan't have fathomed
he shan't have fathomed
we shan't have fathomed
you shan't have fathomed
they shan't have fathomed	I shan't have been fathoming
you shan't have been fathoming
he shan't have been fathoming
we shan't have been fathoming
you shan't have been fathoming
they shan't have been fathoming	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I fathom?
shan't you fathom?
shan't he fathom?
shan't we fathom?
shan't you fathom?
shan't they fathom? 	shan't I be fathoming?
shan't you be fathoming?
shan't he be fathoming?
shan't we be fathoming?
shan't you be fathoming?
shan't they be fathoming? 	shan't I have fathomed?
shan't you have fathomed?
shan't he have fathomed?
shan't we have fathomed?
shan't you have fathomed?
shan't they have fathomed? 	shan't I have been fathoming?
shan't you have been fathoming?
shan't he have been fathoming?
shan't we have been fathoming?
shan't you have been fathoming?
shan't they have been fathoming?