English verb conjugation
MUST THORN

Regular verb: thorn - thorned - thorned

Affirmation

Simple form	V-ing form
I must thorn you must thorn she must thorn we must thorn you must thorn they must thorn	I must be thorning you must be thorning she must be thorning we must be thorning you must be thorning they must be thorning
Perfect	V-ing perfect
I must have thorned you must have thorned she must have thorned we must have thorned you must have thorned they must have thorned	I must have been thorning you must have been thorning she must have been thorning we must have been thorning you must have been thorning they must have been thorning

Negation

Simple form	V-ing form
I mustn't thorn you mustn't thorn she mustn't thorn we mustn't thorn you mustn't thorn they mustn't thorn	I mustn't be thorning you mustn't be thorning she mustn't be thorning we mustn't be thorning you mustn't be thorning they mustn't be thorning
Perfect	V-ing perfect
I mustn't have thorned you mustn't have thorned she mustn't have thorned we mustn't have thorned you mustn't have thorned they mustn't have thorned	I mustn't have been thorning you mustn't have been thorning she mustn't have been thorning we mustn't have been thorning you mustn't have been thorning they mustn't have been thorning

Interrogative form

Simple form	V-ing form
must I thorn? must you thorn? must she thorn? must we thorn? must you thorn? must they thorn?	must I be thorning? must you be thorning? must she be thorning? must we be thorning? must you be thorning? must they be thorning?
Perfect	V-ing perfect
must I have thorned? must you have thorned? must she have thorned? must we have thorned? must you have thorned? must they have thorned?	must I have been thorning? must you have been thorning? must she have been thorning? must we have been thorning? must you have been thorning? must they have been thorning?

Interro-negative form

Simple form	V-ing form
mustn't I thorn? mustn't you thorn? mustn't she thorn? mustn't we thorn? mustn't you thorn? mustn't they thorn?	mustn't I be thorning? mustn't you be thorning? mustn't she be thorning? mustn't we be thorning? mustn't you be thorning? mustn't they be thorning?
Perfect	V-ing perfect
mustn't I have thorned? mustn't you have thorned? mustn't she have thorned? mustn't we have thorned? mustn't you have thorned? mustn't they have thorned?	mustn't I have been thorning? mustn't you have been thorning? mustn't she have been thorning? mustn't we have been thorning? mustn't you have been thorning? mustn't they have been thorning?