must spruce
Regular verb: spruce - spruced- spruced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must spruce
you must spruce
he must spruce
we must spruce
you must spruce
they must spruce 	I must be sprucing
you must be sprucing
he must be sprucing
we must be sprucing
you must be sprucing
they must be sprucing	I must have spruced
you must have spruced
he must have spruced
we must have spruced
you must have spruced
they must have spruced	I must have been sprucing
you must have been sprucing
he must have been sprucing
we must have been sprucing
you must have been sprucing
they must have been sprucing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't spruce
you mustn't spruce
he mustn't spruce
we mustn't spruce
you mustn't spruce
they mustn't spruce 	I mustn't be sprucing
you mustn't be sprucing
he mustn't be sprucing
we mustn't be sprucing
you mustn't be sprucing
they mustn't be sprucing	I mustn't have spruced
you mustn't have spruced
he mustn't have spruced
we mustn't have spruced
you mustn't have spruced
they mustn't have spruced	I mustn't have been sprucing
you mustn't have been sprucing
he mustn't have been sprucing
we mustn't have been sprucing
you mustn't have been sprucing
they mustn't have been sprucing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I spruce?
must you spruce?
must he spruce?
must we spruce?
must you spruce?
must they spruce? 	must I be sprucing?
must you be sprucing?
must he be sprucing?
must we be sprucing?
must you be sprucing?
must they be sprucing? 	must I have spruced?
must you have spruced?
must he have spruced?
must we have spruced?
must you have spruced?
must they have spruced? 	must I have been sprucing?
must you have been sprucing?
must he have been sprucing?
must we have been sprucing?
must you have been sprucing?
must they have been sprucing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I spruce?
mustn't you spruce?
mustn't he spruce?
mustn't we spruce?
mustn't you spruce?
mustn't they spruce? 	mustn't I be sprucing?
mustn't you be sprucing?
mustn't he be sprucing?
mustn't we be sprucing?
mustn't you be sprucing?
mustn't they be sprucing? 	mustn't I have spruced?
mustn't you have spruced?
mustn't he have spruced?
mustn't we have spruced?
mustn't you have spruced?
mustn't they have spruced? 	mustn't I have been sprucing?
mustn't you have been sprucing?
mustn't he have been sprucing?
mustn't we have been sprucing?
mustn't you have been sprucing?
mustn't they have been sprucing?