English verb conjugation
MUST THORN

Regular verb: thorn - thorned - thorned

Affirmation

Simple form	V-ing form
I must thorn you must thorn he must thorn we must thorn you must thorn they must thorn	I must be thorning you must be thorning he 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 he 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 he 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 must not thorn you must not thorn he must not thorn we must not thorn you must not thorn they must not thorn	I must not be thorning you must not be thorning he must not be thorning we must not be thorning you must not be thorning they must not be thorning
Perfect	V-ing perfect
I must not have thorned you must not have thorned he must not have thorned we must not have thorned you must not have thorned they must not have thorned	I must not have been thorning you must not have been thorning he must not have been thorning we must not have been thorning you must not have been thorning they must not have been thorning

Interrogative form

Simple form	V-ing form
must I thorn? must you thorn? must he thorn? must we thorn? must you thorn? must they thorn?	must I be thorning? must you be thorning? must he 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 he 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 he 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
must I not thorn? must you not thorn? must he not thorn? must we not thorn? must you not thorn? must they not thorn?	must I not be thorning? must you not be thorning? must he not be thorning? must we not be thorning? must you not be thorning? must they not be thorning?
Perfect	V-ing perfect
must I not have thorned? must you not have thorned? must he not have thorned? must we not have thorned? must you not have thorned? must they not have thorned?	must I not have been thorning? must you not have been thorning? must he not have been thorning? must we not have been thorning? must you not have been thorning? must they not have been thorning?