must prune
Regular verb: prune - pruned- pruned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prune
you must prune
she must prune
we must prune
you must prune
they must prune 	I must be pruning
you must be pruning
she must be pruning
we must be pruning
you must be pruning
they must be pruning	I must have pruned
you must have pruned
she 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
she 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 must not prune
you must not prune
she must not prune
we must not prune
you must not prune
they must not prune 	I must not be pruning
you must not be pruning
she must not be pruning
we must not be pruning
you must not be pruning
they must not be pruning	I must not have pruned
you must not have pruned
she must not have pruned
we must not have pruned
you must not have pruned
they must not have pruned	I must not have been pruning
you must not have been pruning
she must not have been pruning
we must not have been pruning
you must not have been pruning
they must not have been pruning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prune?
must you prune?
must she prune?
must we prune?
must you prune?
must they prune? 	must I be pruning?
must you be pruning?
must she be pruning?
must we be pruning?
must you be pruning?
must they be pruning? 	must I have pruned?
must you have pruned?
must she 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 she 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 	
must I not prune?
must you not prune?
must she not prune?
must we not prune?
must you not prune?
must they not prune? 	must I not be pruning?
must you not be pruning?
must she not be pruning?
must we not be pruning?
must you not be pruning?
must they not be pruning? 	must I not have pruned?
must you not have pruned?
must she not have pruned?
must we not have pruned?
must you not have pruned?
must they not have pruned? 	must I not have been pruning?
must you not have been pruning?
must she not have been pruning?
must we not have been pruning?
must you not have been pruning?
must they not have been pruning?