I must shilly-shally you must shilly-shally he must shilly-shally we must shilly-shally you must shilly-shally they must shilly-shally
V-ing form
I must be shilly-shallying you must be shilly-shallying he must be shilly-shallying we must be shilly-shallying you must be shilly-shallying they must be shilly-shallying
Perfect
I must have shilly-shallied you must have shilly-shallied he must have shilly-shallied we must have shilly-shallied you must have shilly-shallied they must have shilly-shallied
V-ing perfect
I must have been shilly-shallying you must have been shilly-shallying he must have been shilly-shallying we must have been shilly-shallying you must have been shilly-shallying they must have been shilly-shallying
Negation
Simple form
I must not shilly-shally you must not shilly-shally he must not shilly-shally we must not shilly-shally you must not shilly-shally they must not shilly-shally
V-ing form
I must not be shilly-shallying you must not be shilly-shallying he must not be shilly-shallying we must not be shilly-shallying you must not be shilly-shallying they must not be shilly-shallying
Perfect
I must not have shilly-shallied you must not have shilly-shallied he must not have shilly-shallied we must not have shilly-shallied you must not have shilly-shallied they must not have shilly-shallied
V-ing perfect
I must not have been shilly-shallying you must not have been shilly-shallying he must not have been shilly-shallying we must not have been shilly-shallying you must not have been shilly-shallying they must not have been shilly-shallying
Interrogative form
Simple form
must I shilly-shally? must you shilly-shally? must he shilly-shally? must we shilly-shally? must you shilly-shally? must they shilly-shally?
V-ing form
must I be shilly-shallying? must you be shilly-shallying? must he be shilly-shallying? must we be shilly-shallying? must you be shilly-shallying? must they be shilly-shallying?
Perfect
must I have shilly-shallied? must you have shilly-shallied? must he have shilly-shallied? must we have shilly-shallied? must you have shilly-shallied? must they have shilly-shallied?
V-ing perfect
must I have been shilly-shallying? must you have been shilly-shallying? must he have been shilly-shallying? must we have been shilly-shallying? must you have been shilly-shallying? must they have been shilly-shallying?
Interro-negative form
Simple form
must I not shilly-shally? must you not shilly-shally? must he not shilly-shally? must we not shilly-shally? must you not shilly-shally? must they not shilly-shally?
V-ing form
must I not be shilly-shallying? must you not be shilly-shallying? must he not be shilly-shallying? must we not be shilly-shallying? must you not be shilly-shallying? must they not be shilly-shallying?
Perfect
must I not have shilly-shallied? must you not have shilly-shallied? must he not have shilly-shallied? must we not have shilly-shallied? must you not have shilly-shallied? must they not have shilly-shallied?
V-ing perfect
must I not have been shilly-shallying? must you not have been shilly-shallying? must he not have been shilly-shallying? must we not have been shilly-shallying? must you not have been shilly-shallying? must they not have been shilly-shallying?