I must lazy you must lazy he must lazy we must lazy you must lazy they must lazy
V-ing form
I must be lazying you must be lazying he must be lazying we must be lazying you must be lazying they must be lazying
Perfect
I must have lazied you must have lazied he must have lazied we must have lazied you must have lazied they must have lazied
V-ing perfect
I must have been lazying you must have been lazying he must have been lazying we must have been lazying you must have been lazying they must have been lazying
Negation
Simple form
I must not lazy you must not lazy he must not lazy we must not lazy you must not lazy they must not lazy
V-ing form
I must not be lazying you must not be lazying he must not be lazying we must not be lazying you must not be lazying they must not be lazying
Perfect
I must not have lazied you must not have lazied he must not have lazied we must not have lazied you must not have lazied they must not have lazied
V-ing perfect
I must not have been lazying you must not have been lazying he must not have been lazying we must not have been lazying you must not have been lazying they must not have been lazying
Interrogative form
Simple form
must I lazy? must you lazy? must he lazy? must we lazy? must you lazy? must they lazy?
V-ing form
must I be lazying? must you be lazying? must he be lazying? must we be lazying? must you be lazying? must they be lazying?
Perfect
must I have lazied? must you have lazied? must he have lazied? must we have lazied? must you have lazied? must they have lazied?
V-ing perfect
must I have been lazying? must you have been lazying? must he have been lazying? must we have been lazying? must you have been lazying? must they have been lazying?
Interro-negative form
Simple form
must I not lazy? must you not lazy? must he not lazy? must we not lazy? must you not lazy? must they not lazy?
V-ing form
must I not be lazying? must you not be lazying? must he not be lazying? must we not be lazying? must you not be lazying? must they not be lazying?
Perfect
must I not have lazied? must you not have lazied? must he not have lazied? must we not have lazied? must you not have lazied? must they not have lazied?
V-ing perfect
must I not have been lazying? must you not have been lazying? must he not have been lazying? must we not have been lazying? must you not have been lazying? must they not have been lazying?