should fathom
Regular verb: fathom - fathomed- fathomed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should fathom
you should fathom
she should fathom
we should fathom
you should fathom
they should fathom 	I should be fathoming
you should be fathoming
she should be fathoming
we should be fathoming
you should be fathoming
they should be fathoming	I should have fathomed
you should have fathomed
she should have fathomed
we should have fathomed
you should have fathomed
they should have fathomed	I should have been fathoming
you should have been fathoming
she should have been fathoming
we should have been fathoming
you should have been fathoming
they should have been fathoming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not fathom
you should not fathom
she should not fathom
we should not fathom
you should not fathom
they should not fathom 	I should not be fathoming
you should not be fathoming
she should not be fathoming
we should not be fathoming
you should not be fathoming
they should not be fathoming	I should not have fathomed
you should not have fathomed
she should not have fathomed
we should not have fathomed
you should not have fathomed
they should not have fathomed	I should not have been fathoming
you should not have been fathoming
she should not have been fathoming
we should not have been fathoming
you should not have been fathoming
they should not have been fathoming	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not fathom?
should you not fathom?
should she not fathom?
should we not fathom?
should you not fathom?
should they not fathom? 	should I not be fathoming?
should you not be fathoming?
should she not be fathoming?
should we not be fathoming?
should you not be fathoming?
should they not be fathoming? 	should I not have fathomed?
should you not have fathomed?
should she not have fathomed?
should we not have fathomed?
should you not have fathomed?
should they not have fathomed? 	should I not have been fathoming?
should you not have been fathoming?
should she not have been fathoming?
should we not have been fathoming?
should you not have been fathoming?
should they not have been fathoming?