I must nod you must nod she must nod we must nod you must nod they must nod
V-ing form
I must be nodding you must be nodding she must be nodding we must be nodding you must be nodding they must be nodding
Perfect
I must have nodded you must have nodded she must have nodded we must have nodded you must have nodded they must have nodded
V-ing perfect
I must have been nodding you must have been nodding she must have been nodding we must have been nodding you must have been nodding they must have been nodding
Negation
Simple form
I mustn't nod you mustn't nod she mustn't nod we mustn't nod you mustn't nod they mustn't nod
V-ing form
I mustn't be nodding you mustn't be nodding she mustn't be nodding we mustn't be nodding you mustn't be nodding they mustn't be nodding
Perfect
I mustn't have nodded you mustn't have nodded she mustn't have nodded we mustn't have nodded you mustn't have nodded they mustn't have nodded
V-ing perfect
I mustn't have been nodding you mustn't have been nodding she mustn't have been nodding we mustn't have been nodding you mustn't have been nodding they mustn't have been nodding
Interrogative form
Simple form
must I nod? must you nod? must she nod? must we nod? must you nod? must they nod?
V-ing form
must I be nodding? must you be nodding? must she be nodding? must we be nodding? must you be nodding? must they be nodding?
Perfect
must I have nodded? must you have nodded? must she have nodded? must we have nodded? must you have nodded? must they have nodded?
V-ing perfect
must I have been nodding? must you have been nodding? must she have been nodding? must we have been nodding? must you have been nodding? must they have been nodding?
Interro-negative form
Simple form
mustn't I nod? mustn't you nod? mustn't she nod? mustn't we nod? mustn't you nod? mustn't they nod?
V-ing form
mustn't I be nodding? mustn't you be nodding? mustn't she be nodding? mustn't we be nodding? mustn't you be nodding? mustn't they be nodding?
Perfect
mustn't I have nodded? mustn't you have nodded? mustn't she have nodded? mustn't we have nodded? mustn't you have nodded? mustn't they have nodded?
V-ing perfect
mustn't I have been nodding? mustn't you have been nodding? mustn't she have been nodding? mustn't we have been nodding? mustn't you have been nodding? mustn't they have been nodding?