English verb conjugation
MUST SHUDDER

Regular verb: shudder - shuddered - shuddered

Affirmation

Simple form	V-ing form
I must shudder you must shudder she must shudder we must shudder you must shudder they must shudder	I must be shuddering you must be shuddering she must be shuddering we must be shuddering you must be shuddering they must be shuddering
Perfect	V-ing perfect
I must have shuddered you must have shuddered she must have shuddered we must have shuddered you must have shuddered they must have shuddered	I must have been shuddering you must have been shuddering she must have been shuddering we must have been shuddering you must have been shuddering they must have been shuddering

Negation

Simple form	V-ing form
I mustn't shudder you mustn't shudder she mustn't shudder we mustn't shudder you mustn't shudder they mustn't shudder	I mustn't be shuddering you mustn't be shuddering she mustn't be shuddering we mustn't be shuddering you mustn't be shuddering they mustn't be shuddering
Perfect	V-ing perfect
I mustn't have shuddered you mustn't have shuddered she mustn't have shuddered we mustn't have shuddered you mustn't have shuddered they mustn't have shuddered	I mustn't have been shuddering you mustn't have been shuddering she mustn't have been shuddering we mustn't have been shuddering you mustn't have been shuddering they mustn't have been shuddering

Interrogative form

Simple form	V-ing form
must I shudder? must you shudder? must she shudder? must we shudder? must you shudder? must they shudder?	must I be shuddering? must you be shuddering? must she be shuddering? must we be shuddering? must you be shuddering? must they be shuddering?
Perfect	V-ing perfect
must I have shuddered? must you have shuddered? must she have shuddered? must we have shuddered? must you have shuddered? must they have shuddered?	must I have been shuddering? must you have been shuddering? must she have been shuddering? must we have been shuddering? must you have been shuddering? must they have been shuddering?

Interro-negative form

Simple form	V-ing form
mustn't I shudder? mustn't you shudder? mustn't she shudder? mustn't we shudder? mustn't you shudder? mustn't they shudder?	mustn't I be shuddering? mustn't you be shuddering? mustn't she be shuddering? mustn't we be shuddering? mustn't you be shuddering? mustn't they be shuddering?
Perfect	V-ing perfect
mustn't I have shuddered? mustn't you have shuddered? mustn't she have shuddered? mustn't we have shuddered? mustn't you have shuddered? mustn't they have shuddered?	mustn't I have been shuddering? mustn't you have been shuddering? mustn't she have been shuddering? mustn't we have been shuddering? mustn't you have been shuddering? mustn't they have been shuddering?