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 mustn't enrich
you mustn't enrich
he mustn't enrich
we mustn't enrich
you mustn't enrich
they mustn't enrich 	I mustn't be enriching
you mustn't be enriching
he mustn't be enriching
we mustn't be enriching
you mustn't be enriching
they mustn't be enriching	I mustn't have enriched
you mustn't have enriched
he mustn't have enriched
we mustn't have enriched
you mustn't have enriched
they mustn't have enriched	I mustn't have been enriching
you mustn't have been enriching
he mustn't have been enriching
we mustn't have been enriching
you mustn't have been enriching
they mustn't 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 	
mustn't I enrich?
mustn't you enrich?
mustn't he enrich?
mustn't we enrich?
mustn't you enrich?
mustn't they enrich? 	mustn't I be enriching?
mustn't you be enriching?
mustn't he be enriching?
mustn't we be enriching?
mustn't you be enriching?
mustn't they be enriching? 	mustn't I have enriched?
mustn't you have enriched?
mustn't he have enriched?
mustn't we have enriched?
mustn't you have enriched?
mustn't they have enriched? 	mustn't I have been enriching?
mustn't you have been enriching?
mustn't he have been enriching?
mustn't we have been enriching?
mustn't you have been enriching?
mustn't they have been enriching?