English verb conjugation
MUST SPRIG

Regular verb: sprig - sprigged - sprigged

Affirmation

Simple form	V-ing form
I must sprig you must sprig she must sprig we must sprig you must sprig they must sprig	I must be sprigging you must be sprigging she must be sprigging we must be sprigging you must be sprigging they must be sprigging
Perfect	V-ing perfect
I must have sprigged you must have sprigged she must have sprigged we must have sprigged you must have sprigged they must have sprigged	I must have been sprigging you must have been sprigging she must have been sprigging we must have been sprigging you must have been sprigging they must have been sprigging

Negation

Simple form	V-ing form
I mustn't sprig you mustn't sprig she mustn't sprig we mustn't sprig you mustn't sprig they mustn't sprig	I mustn't be sprigging you mustn't be sprigging she mustn't be sprigging we mustn't be sprigging you mustn't be sprigging they mustn't be sprigging
Perfect	V-ing perfect
I mustn't have sprigged you mustn't have sprigged she mustn't have sprigged we mustn't have sprigged you mustn't have sprigged they mustn't have sprigged	I mustn't have been sprigging you mustn't have been sprigging she mustn't have been sprigging we mustn't have been sprigging you mustn't have been sprigging they mustn't have been sprigging

Interrogative form

Simple form	V-ing form
must I sprig? must you sprig? must she sprig? must we sprig? must you sprig? must they sprig?	must I be sprigging? must you be sprigging? must she be sprigging? must we be sprigging? must you be sprigging? must they be sprigging?
Perfect	V-ing perfect
must I have sprigged? must you have sprigged? must she have sprigged? must we have sprigged? must you have sprigged? must they have sprigged?	must I have been sprigging? must you have been sprigging? must she have been sprigging? must we have been sprigging? must you have been sprigging? must they have been sprigging?

Interro-negative form

Simple form	V-ing form
mustn't I sprig? mustn't you sprig? mustn't she sprig? mustn't we sprig? mustn't you sprig? mustn't they sprig?	mustn't I be sprigging? mustn't you be sprigging? mustn't she be sprigging? mustn't we be sprigging? mustn't you be sprigging? mustn't they be sprigging?
Perfect	V-ing perfect
mustn't I have sprigged? mustn't you have sprigged? mustn't she have sprigged? mustn't we have sprigged? mustn't you have sprigged? mustn't they have sprigged?	mustn't I have been sprigging? mustn't you have been sprigging? mustn't she have been sprigging? mustn't we have been sprigging? mustn't you have been sprigging? mustn't they have been sprigging?