English verb conjugation
MUST SHIVER

Regular verb: shiver - shivered - shivered

Affirmation

Simple form	V-ing form
I must shiver you must shiver she must shiver we must shiver you must shiver they must shiver	I must be shivering you must be shivering she must be shivering we must be shivering you must be shivering they must be shivering
Perfect	V-ing perfect
I must have shivered you must have shivered she must have shivered we must have shivered you must have shivered they must have shivered	I must have been shivering you must have been shivering she must have been shivering we must have been shivering you must have been shivering they must have been shivering

Negation

Simple form	V-ing form
I mustn't shiver you mustn't shiver she mustn't shiver we mustn't shiver you mustn't shiver they mustn't shiver	I mustn't be shivering you mustn't be shivering she mustn't be shivering we mustn't be shivering you mustn't be shivering they mustn't be shivering
Perfect	V-ing perfect
I mustn't have shivered you mustn't have shivered she mustn't have shivered we mustn't have shivered you mustn't have shivered they mustn't have shivered	I mustn't have been shivering you mustn't have been shivering she mustn't have been shivering we mustn't have been shivering you mustn't have been shivering they mustn't have been shivering

Interrogative form

Simple form	V-ing form
must I shiver? must you shiver? must she shiver? must we shiver? must you shiver? must they shiver?	must I be shivering? must you be shivering? must she be shivering? must we be shivering? must you be shivering? must they be shivering?
Perfect	V-ing perfect
must I have shivered? must you have shivered? must she have shivered? must we have shivered? must you have shivered? must they have shivered?	must I have been shivering? must you have been shivering? must she have been shivering? must we have been shivering? must you have been shivering? must they have been shivering?

Interro-negative form

Simple form	V-ing form
mustn't I shiver? mustn't you shiver? mustn't she shiver? mustn't we shiver? mustn't you shiver? mustn't they shiver?	mustn't I be shivering? mustn't you be shivering? mustn't she be shivering? mustn't we be shivering? mustn't you be shivering? mustn't they be shivering?
Perfect	V-ing perfect
mustn't I have shivered? mustn't you have shivered? mustn't she have shivered? mustn't we have shivered? mustn't you have shivered? mustn't they have shivered?	mustn't I have been shivering? mustn't you have been shivering? mustn't she have been shivering? mustn't we have been shivering? mustn't you have been shivering? mustn't they have been shivering?