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 must not spring-clean
you must not spring-clean
he must not spring-clean
we must not spring-clean
you must not spring-clean
they must not spring-clean 	I must not be spring-cleaning
you must not be spring-cleaning
he must not be spring-cleaning
we must not be spring-cleaning
you must not be spring-cleaning
they must not be spring-cleaning	I must not have spring-cleaned
you must not have spring-cleaned
he must not have spring-cleaned
we must not have spring-cleaned
you must not have spring-cleaned
they must not have spring-cleaned	I must not have been spring-cleaning
you must not have been spring-cleaning
he must not have been spring-cleaning
we must not have been spring-cleaning
you must not have been spring-cleaning
they must not 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 	
must I not spring-clean?
must you not spring-clean?
must he not spring-clean?
must we not spring-clean?
must you not spring-clean?
must they not spring-clean? 	must I not be spring-cleaning?
must you not be spring-cleaning?
must he not be spring-cleaning?
must we not be spring-cleaning?
must you not be spring-cleaning?
must they not be spring-cleaning? 	must I not have spring-cleaned?
must you not have spring-cleaned?
must he not have spring-cleaned?
must we not have spring-cleaned?
must you not have spring-cleaned?
must they not have spring-cleaned? 	must I not have been spring-cleaning?
must you not have been spring-cleaning?
must he not have been spring-cleaning?
must we not have been spring-cleaning?
must you not have been spring-cleaning?
must they not have been spring-cleaning?