I must graze you must graze he must graze we must graze you must graze they must graze
V-ing form
I must be grazing you must be grazing he must be grazing we must be grazing you must be grazing they must be grazing
Perfect
I must have grazed you must have grazed he must have grazed we must have grazed you must have grazed they must have grazed
V-ing perfect
I must have been grazing you must have been grazing he must have been grazing we must have been grazing you must have been grazing they must have been grazing
Negation
Simple form
I must not graze you must not graze he must not graze we must not graze you must not graze they must not graze
V-ing form
I must not be grazing you must not be grazing he must not be grazing we must not be grazing you must not be grazing they must not be grazing
Perfect
I must not have grazed you must not have grazed he must not have grazed we must not have grazed you must not have grazed they must not have grazed
V-ing perfect
I must not have been grazing you must not have been grazing he must not have been grazing we must not have been grazing you must not have been grazing they must not have been grazing
Interrogative form
Simple form
must I graze? must you graze? must he graze? must we graze? must you graze? must they graze?
V-ing form
must I be grazing? must you be grazing? must he be grazing? must we be grazing? must you be grazing? must they be grazing?
Perfect
must I have grazed? must you have grazed? must he have grazed? must we have grazed? must you have grazed? must they have grazed?
V-ing perfect
must I have been grazing? must you have been grazing? must he have been grazing? must we have been grazing? must you have been grazing? must they have been grazing?
Interro-negative form
Simple form
must I not graze? must you not graze? must he not graze? must we not graze? must you not graze? must they not graze?
V-ing form
must I not be grazing? must you not be grazing? must he not be grazing? must we not be grazing? must you not be grazing? must they not be grazing?
Perfect
must I not have grazed? must you not have grazed? must he not have grazed? must we not have grazed? must you not have grazed? must they not have grazed?
V-ing perfect
must I not have been grazing? must you not have been grazing? must he not have been grazing? must we not have been grazing? must you not have been grazing? must they not have been grazing?