must enrich
Regular verb: enrich - enriched- enriched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must enrich
you must enrich
he must enrich
we must enrich
you must enrich
they must enrich 	I must be enriching
you must be enriching
he must be enriching
we must be enriching
you must be enriching
they must be enriching	I must have enriched
you must have enriched
he must have enriched
we must have enriched
you must have enriched
they must have enriched	I must have been enriching
you must have been enriching
he must have been enriching
we must have been enriching
you must have been enriching
they must have been enriching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not enrich
you must not enrich
he must not enrich
we must not enrich
you must not enrich
they must not enrich 	I must not be enriching
you must not be enriching
he must not be enriching
we must not be enriching
you must not be enriching
they must not be enriching	I must not have enriched
you must not have enriched
he must not have enriched
we must not have enriched
you must not have enriched
they must not have enriched	I must not have been enriching
you must not have been enriching
he must not have been enriching
we must not have been enriching
you must not have been enriching
they must not have been enriching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I enrich?
must you enrich?
must he enrich?
must we enrich?
must you enrich?
must they enrich? 	must I be enriching?
must you be enriching?
must he be enriching?
must we be enriching?
must you be enriching?
must they be enriching? 	must I have enriched?
must you have enriched?
must he have enriched?
must we have enriched?
must you have enriched?
must they have enriched? 	must I have been enriching?
must you have been enriching?
must he have been enriching?
must we have been enriching?
must you have been enriching?
must they have been enriching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not enrich?
must you not enrich?
must he not enrich?
must we not enrich?
must you not enrich?
must they not enrich? 	must I not be enriching?
must you not be enriching?
must he not be enriching?
must we not be enriching?
must you not be enriching?
must they not be enriching? 	must I not have enriched?
must you not have enriched?
must he not have enriched?
must we not have enriched?
must you not have enriched?
must they not have enriched? 	must I not have been enriching?
must you not have been enriching?
must he not have been enriching?
must we not have been enriching?
must you not have been enriching?
must they not have been enriching?