must prune
Regular verb: prune - pruned- pruned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prune
you must prune
he must prune
we must prune
you must prune
they must prune 	I must be pruning
you must be pruning
he must be pruning
we must be pruning
you must be pruning
they must be pruning	I must have pruned
you must have pruned
he must have pruned
we must have pruned
you must have pruned
they must have pruned	I must have been pruning
you must have been pruning
he must have been pruning
we must have been pruning
you must have been pruning
they must have been pruning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prune
you mustn't prune
he mustn't prune
we mustn't prune
you mustn't prune
they mustn't prune 	I mustn't be pruning
you mustn't be pruning
he mustn't be pruning
we mustn't be pruning
you mustn't be pruning
they mustn't be pruning	I mustn't have pruned
you mustn't have pruned
he mustn't have pruned
we mustn't have pruned
you mustn't have pruned
they mustn't have pruned	I mustn't have been pruning
you mustn't have been pruning
he mustn't have been pruning
we mustn't have been pruning
you mustn't have been pruning
they mustn't have been pruning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prune?
must you prune?
must he prune?
must we prune?
must you prune?
must they prune? 	must I be pruning?
must you be pruning?
must he be pruning?
must we be pruning?
must you be pruning?
must they be pruning? 	must I have pruned?
must you have pruned?
must he have pruned?
must we have pruned?
must you have pruned?
must they have pruned? 	must I have been pruning?
must you have been pruning?
must he have been pruning?
must we have been pruning?
must you have been pruning?
must they have been pruning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prune?
mustn't you prune?
mustn't he prune?
mustn't we prune?
mustn't you prune?
mustn't they prune? 	mustn't I be pruning?
mustn't you be pruning?
mustn't he be pruning?
mustn't we be pruning?
mustn't you be pruning?
mustn't they be pruning? 	mustn't I have pruned?
mustn't you have pruned?
mustn't he have pruned?
mustn't we have pruned?
mustn't you have pruned?
mustn't they have pruned? 	mustn't I have been pruning?
mustn't you have been pruning?
mustn't he have been pruning?
mustn't we have been pruning?
mustn't you have been pruning?
mustn't they have been pruning?