must spring-clean
Regular verb: spring-clean - spring-cleaned- spring-cleaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must spring-clean
you must spring-clean
he must spring-clean
we must spring-clean
you must spring-clean
they must spring-clean 	I must be spring-cleaning
you must be spring-cleaning
he must be spring-cleaning
we must be spring-cleaning
you must be spring-cleaning
they must be spring-cleaning	I must have spring-cleaned
you must have spring-cleaned
he must have spring-cleaned
we must have spring-cleaned
you must have spring-cleaned
they must have spring-cleaned	I must have been spring-cleaning
you must have been spring-cleaning
he must have been spring-cleaning
we must have been spring-cleaning
you must have been spring-cleaning
they must have been spring-cleaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't spring-clean
you mustn't spring-clean
he mustn't spring-clean
we mustn't spring-clean
you mustn't spring-clean
they mustn't spring-clean 	I mustn't be spring-cleaning
you mustn't be spring-cleaning
he mustn't be spring-cleaning
we mustn't be spring-cleaning
you mustn't be spring-cleaning
they mustn't be spring-cleaning	I mustn't have spring-cleaned
you mustn't have spring-cleaned
he mustn't have spring-cleaned
we mustn't have spring-cleaned
you mustn't have spring-cleaned
they mustn't have spring-cleaned	I mustn't have been spring-cleaning
you mustn't have been spring-cleaning
he mustn't have been spring-cleaning
we mustn't have been spring-cleaning
you mustn't have been spring-cleaning
they mustn't have been spring-cleaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I spring-clean?
must you spring-clean?
must he spring-clean?
must we spring-clean?
must you spring-clean?
must they spring-clean? 	must I be spring-cleaning?
must you be spring-cleaning?
must he be spring-cleaning?
must we be spring-cleaning?
must you be spring-cleaning?
must they be spring-cleaning? 	must I have spring-cleaned?
must you have spring-cleaned?
must he have spring-cleaned?
must we have spring-cleaned?
must you have spring-cleaned?
must they have spring-cleaned? 	must I have been spring-cleaning?
must you have been spring-cleaning?
must he have been spring-cleaning?
must we have been spring-cleaning?
must you have been spring-cleaning?
must they have been spring-cleaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I spring-clean?
mustn't you spring-clean?
mustn't he spring-clean?
mustn't we spring-clean?
mustn't you spring-clean?
mustn't they spring-clean? 	mustn't I be spring-cleaning?
mustn't you be spring-cleaning?
mustn't he be spring-cleaning?
mustn't we be spring-cleaning?
mustn't you be spring-cleaning?
mustn't they be spring-cleaning? 	mustn't I have spring-cleaned?
mustn't you have spring-cleaned?
mustn't he have spring-cleaned?
mustn't we have spring-cleaned?
mustn't you have spring-cleaned?
mustn't they have spring-cleaned? 	mustn't I have been spring-cleaning?
mustn't you have been spring-cleaning?
mustn't he have been spring-cleaning?
mustn't we have been spring-cleaning?
mustn't you have been spring-cleaning?
mustn't they have been spring-cleaning?