must spy
Regular verb: spy - spied- spied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must spy
you must spy
he must spy
we must spy
you must spy
they must spy 	I must be spying
you must be spying
he must be spying
we must be spying
you must be spying
they must be spying	I must have spied
you must have spied
he must have spied
we must have spied
you must have spied
they must have spied	I must have been spying
you must have been spying
he must have been spying
we must have been spying
you must have been spying
they must have been spying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't spy
you mustn't spy
he mustn't spy
we mustn't spy
you mustn't spy
they mustn't spy 	I mustn't be spying
you mustn't be spying
he mustn't be spying
we mustn't be spying
you mustn't be spying
they mustn't be spying	I mustn't have spied
you mustn't have spied
he mustn't have spied
we mustn't have spied
you mustn't have spied
they mustn't have spied	I mustn't have been spying
you mustn't have been spying
he mustn't have been spying
we mustn't have been spying
you mustn't have been spying
they mustn't have been spying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I spy?
must you spy?
must he spy?
must we spy?
must you spy?
must they spy? 	must I be spying?
must you be spying?
must he be spying?
must we be spying?
must you be spying?
must they be spying? 	must I have spied?
must you have spied?
must he have spied?
must we have spied?
must you have spied?
must they have spied? 	must I have been spying?
must you have been spying?
must he have been spying?
must we have been spying?
must you have been spying?
must they have been spying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I spy?
mustn't you spy?
mustn't he spy?
mustn't we spy?
mustn't you spy?
mustn't they spy? 	mustn't I be spying?
mustn't you be spying?
mustn't he be spying?
mustn't we be spying?
mustn't you be spying?
mustn't they be spying? 	mustn't I have spied?
mustn't you have spied?
mustn't he have spied?
mustn't we have spied?
mustn't you have spied?
mustn't they have spied? 	mustn't I have been spying?
mustn't you have been spying?
mustn't he have been spying?
mustn't we have been spying?
mustn't you have been spying?
mustn't they have been spying?