must fossick
Regular verb: fossick - fossicked- fossicked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fossick
you must fossick
she must fossick
we must fossick
you must fossick
they must fossick 	I must be fossicking
you must be fossicking
she must be fossicking
we must be fossicking
you must be fossicking
they must be fossicking	I must have fossicked
you must have fossicked
she must have fossicked
we must have fossicked
you must have fossicked
they must have fossicked	I must have been fossicking
you must have been fossicking
she must have been fossicking
we must have been fossicking
you must have been fossicking
they must have been fossicking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not fossick
you must not fossick
she must not fossick
we must not fossick
you must not fossick
they must not fossick 	I must not be fossicking
you must not be fossicking
she must not be fossicking
we must not be fossicking
you must not be fossicking
they must not be fossicking	I must not have fossicked
you must not have fossicked
she must not have fossicked
we must not have fossicked
you must not have fossicked
they must not have fossicked	I must not have been fossicking
you must not have been fossicking
she must not have been fossicking
we must not have been fossicking
you must not have been fossicking
they must not have been fossicking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fossick?
must you fossick?
must she fossick?
must we fossick?
must you fossick?
must they fossick? 	must I be fossicking?
must you be fossicking?
must she be fossicking?
must we be fossicking?
must you be fossicking?
must they be fossicking? 	must I have fossicked?
must you have fossicked?
must she have fossicked?
must we have fossicked?
must you have fossicked?
must they have fossicked? 	must I have been fossicking?
must you have been fossicking?
must she have been fossicking?
must we have been fossicking?
must you have been fossicking?
must they have been fossicking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not fossick?
must you not fossick?
must she not fossick?
must we not fossick?
must you not fossick?
must they not fossick? 	must I not be fossicking?
must you not be fossicking?
must she not be fossicking?
must we not be fossicking?
must you not be fossicking?
must they not be fossicking? 	must I not have fossicked?
must you not have fossicked?
must she not have fossicked?
must we not have fossicked?
must you not have fossicked?
must they not have fossicked? 	must I not have been fossicking?
must you not have been fossicking?
must she not have been fossicking?
must we not have been fossicking?
must you not have been fossicking?
must they not have been fossicking?