must espy
Regular verb: espy - espied- espied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must espy
you must espy
she must espy
we must espy
you must espy
they must espy 	I must be espying
you must be espying
she must be espying
we must be espying
you must be espying
they must be espying	I must have espied
you must have espied
she must have espied
we must have espied
you must have espied
they must have espied	I must have been espying
you must have been espying
she must have been espying
we must have been espying
you must have been espying
they must have been espying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not espy
you must not espy
she must not espy
we must not espy
you must not espy
they must not espy 	I must not be espying
you must not be espying
she must not be espying
we must not be espying
you must not be espying
they must not be espying	I must not have espied
you must not have espied
she must not have espied
we must not have espied
you must not have espied
they must not have espied	I must not have been espying
you must not have been espying
she must not have been espying
we must not have been espying
you must not have been espying
they must not have been espying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I espy?
must you espy?
must she espy?
must we espy?
must you espy?
must they espy? 	must I be espying?
must you be espying?
must she be espying?
must we be espying?
must you be espying?
must they be espying? 	must I have espied?
must you have espied?
must she have espied?
must we have espied?
must you have espied?
must they have espied? 	must I have been espying?
must you have been espying?
must she have been espying?
must we have been espying?
must you have been espying?
must they have been espying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not espy?
must you not espy?
must she not espy?
must we not espy?
must you not espy?
must they not espy? 	must I not be espying?
must you not be espying?
must she not be espying?
must we not be espying?
must you not be espying?
must they not be espying? 	must I not have espied?
must you not have espied?
must she not have espied?
must we not have espied?
must you not have espied?
must they not have espied? 	must I not have been espying?
must you not have been espying?
must she not have been espying?
must we not have been espying?
must you not have been espying?
must they not have been espying?