English verb conjugation
MUST SMOOTH

Regular verb: smooth - smoothed - smoothed

Affirmation

Simple form	V-ing form
I must smooth you must smooth she must smooth we must smooth you must smooth they must smooth	I must be smoothing you must be smoothing she must be smoothing we must be smoothing you must be smoothing they must be smoothing
Perfect	V-ing perfect
I must have smoothed you must have smoothed she must have smoothed we must have smoothed you must have smoothed they must have smoothed	I must have been smoothing you must have been smoothing she must have been smoothing we must have been smoothing you must have been smoothing they must have been smoothing

Negation

Simple form	V-ing form
I must not smooth you must not smooth she must not smooth we must not smooth you must not smooth they must not smooth	I must not be smoothing you must not be smoothing she must not be smoothing we must not be smoothing you must not be smoothing they must not be smoothing
Perfect	V-ing perfect
I must not have smoothed you must not have smoothed she must not have smoothed we must not have smoothed you must not have smoothed they must not have smoothed	I must not have been smoothing you must not have been smoothing she must not have been smoothing we must not have been smoothing you must not have been smoothing they must not have been smoothing

Interrogative form

Simple form	V-ing form
must I smooth? must you smooth? must she smooth? must we smooth? must you smooth? must they smooth?	must I be smoothing? must you be smoothing? must she be smoothing? must we be smoothing? must you be smoothing? must they be smoothing?
Perfect	V-ing perfect
must I have smoothed? must you have smoothed? must she have smoothed? must we have smoothed? must you have smoothed? must they have smoothed?	must I have been smoothing? must you have been smoothing? must she have been smoothing? must we have been smoothing? must you have been smoothing? must they have been smoothing?

Interro-negative form

Simple form	V-ing form
must I not smooth? must you not smooth? must she not smooth? must we not smooth? must you not smooth? must they not smooth?	must I not be smoothing? must you not be smoothing? must she not be smoothing? must we not be smoothing? must you not be smoothing? must they not be smoothing?
Perfect	V-ing perfect
must I not have smoothed? must you not have smoothed? must she not have smoothed? must we not have smoothed? must you not have smoothed? must they not have smoothed?	must I not have been smoothing? must you not have been smoothing? must she not have been smoothing? must we not have been smoothing? must you not have been smoothing? must they not have been smoothing?