English verb conjugation
MUST BALK

Regular verb: balk - balked - balked

Affirmation

Simple form	V-ing form
I must balk you must balk she must balk we must balk you must balk they must balk	I must be balking you must be balking she must be balking we must be balking you must be balking they must be balking
Perfect	V-ing perfect
I must have balked you must have balked she must have balked we must have balked you must have balked they must have balked	I must have been balking you must have been balking she must have been balking we must have been balking you must have been balking they must have been balking

Negation

Simple form	V-ing form
I must not balk you must not balk she must not balk we must not balk you must not balk they must not balk	I must not be balking you must not be balking she must not be balking we must not be balking you must not be balking they must not be balking
Perfect	V-ing perfect
I must not have balked you must not have balked she must not have balked we must not have balked you must not have balked they must not have balked	I must not have been balking you must not have been balking she must not have been balking we must not have been balking you must not have been balking they must not have been balking

Interrogative form

Simple form	V-ing form
must I balk? must you balk? must she balk? must we balk? must you balk? must they balk?	must I be balking? must you be balking? must she be balking? must we be balking? must you be balking? must they be balking?
Perfect	V-ing perfect
must I have balked? must you have balked? must she have balked? must we have balked? must you have balked? must they have balked?	must I have been balking? must you have been balking? must she have been balking? must we have been balking? must you have been balking? must they have been balking?

Interro-negative form

Simple form	V-ing form
must I not balk? must you not balk? must she not balk? must we not balk? must you not balk? must they not balk?	must I not be balking? must you not be balking? must she not be balking? must we not be balking? must you not be balking? must they not be balking?
Perfect	V-ing perfect
must I not have balked? must you not have balked? must she not have balked? must we not have balked? must you not have balked? must they not have balked?	must I not have been balking? must you not have been balking? must she not have been balking? must we not have been balking? must you not have been balking? must they not have been balking?