must insure
Regular verb: insure - insured- insured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must insure
you must insure
she must insure
we must insure
you must insure
they must insure 	I must be insuring
you must be insuring
she must be insuring
we must be insuring
you must be insuring
they must be insuring	I must have insured
you must have insured
she must have insured
we must have insured
you must have insured
they must have insured	I must have been insuring
you must have been insuring
she must have been insuring
we must have been insuring
you must have been insuring
they must have been insuring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not insure
you must not insure
she must not insure
we must not insure
you must not insure
they must not insure 	I must not be insuring
you must not be insuring
she must not be insuring
we must not be insuring
you must not be insuring
they must not be insuring	I must not have insured
you must not have insured
she must not have insured
we must not have insured
you must not have insured
they must not have insured	I must not have been insuring
you must not have been insuring
she must not have been insuring
we must not have been insuring
you must not have been insuring
they must not have been insuring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I insure?
must you insure?
must she insure?
must we insure?
must you insure?
must they insure? 	must I be insuring?
must you be insuring?
must she be insuring?
must we be insuring?
must you be insuring?
must they be insuring? 	must I have insured?
must you have insured?
must she have insured?
must we have insured?
must you have insured?
must they have insured? 	must I have been insuring?
must you have been insuring?
must she have been insuring?
must we have been insuring?
must you have been insuring?
must they have been insuring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not insure?
must you not insure?
must she not insure?
must we not insure?
must you not insure?
must they not insure? 	must I not be insuring?
must you not be insuring?
must she not be insuring?
must we not be insuring?
must you not be insuring?
must they not be insuring? 	must I not have insured?
must you not have insured?
must she not have insured?
must we not have insured?
must you not have insured?
must they not have insured? 	must I not have been insuring?
must you not have been insuring?
must she not have been insuring?
must we not have been insuring?
must you not have been insuring?
must they not have been insuring?