must spade
Regular verb: spade - spaded- spaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must spade
you must spade
he must spade
we must spade
you must spade
they must spade 	I must be spading
you must be spading
he must be spading
we must be spading
you must be spading
they must be spading	I must have spaded
you must have spaded
he must have spaded
we must have spaded
you must have spaded
they must have spaded	I must have been spading
you must have been spading
he must have been spading
we must have been spading
you must have been spading
they must have been spading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't spade
you mustn't spade
he mustn't spade
we mustn't spade
you mustn't spade
they mustn't spade 	I mustn't be spading
you mustn't be spading
he mustn't be spading
we mustn't be spading
you mustn't be spading
they mustn't be spading	I mustn't have spaded
you mustn't have spaded
he mustn't have spaded
we mustn't have spaded
you mustn't have spaded
they mustn't have spaded	I mustn't have been spading
you mustn't have been spading
he mustn't have been spading
we mustn't have been spading
you mustn't have been spading
they mustn't have been spading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I spade?
must you spade?
must he spade?
must we spade?
must you spade?
must they spade? 	must I be spading?
must you be spading?
must he be spading?
must we be spading?
must you be spading?
must they be spading? 	must I have spaded?
must you have spaded?
must he have spaded?
must we have spaded?
must you have spaded?
must they have spaded? 	must I have been spading?
must you have been spading?
must he have been spading?
must we have been spading?
must you have been spading?
must they have been spading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I spade?
mustn't you spade?
mustn't he spade?
mustn't we spade?
mustn't you spade?
mustn't they spade? 	mustn't I be spading?
mustn't you be spading?
mustn't he be spading?
mustn't we be spading?
mustn't you be spading?
mustn't they be spading? 	mustn't I have spaded?
mustn't you have spaded?
mustn't he have spaded?
mustn't we have spaded?
mustn't you have spaded?
mustn't they have spaded? 	mustn't I have been spading?
mustn't you have been spading?
mustn't he have been spading?
mustn't we have been spading?
mustn't you have been spading?
mustn't they have been spading?