English verb conjugation
MUST ENAMEL

Regular verb: enamel - enamelled - enamelled

Affirmation

Simple form	V-ing form
I must enamel you must enamel she must enamel we must enamel you must enamel they must enamel	I must be enamelling you must be enamelling she must be enamelling we must be enamelling you must be enamelling they must be enamelling
Perfect	V-ing perfect
I must have enamelled you must have enamelled she must have enamelled we must have enamelled you must have enamelled they must have enamelled	I must have been enamelling you must have been enamelling she must have been enamelling we must have been enamelling you must have been enamelling they must have been enamelling

Negation

Simple form	V-ing form
I mustn't enamel you mustn't enamel she mustn't enamel we mustn't enamel you mustn't enamel they mustn't enamel	I mustn't be enamelling you mustn't be enamelling she mustn't be enamelling we mustn't be enamelling you mustn't be enamelling they mustn't be enamelling
Perfect	V-ing perfect
I mustn't have enamelled you mustn't have enamelled she mustn't have enamelled we mustn't have enamelled you mustn't have enamelled they mustn't have enamelled	I mustn't have been enamelling you mustn't have been enamelling she mustn't have been enamelling we mustn't have been enamelling you mustn't have been enamelling they mustn't have been enamelling

Interrogative form

Simple form	V-ing form
must I enamel? must you enamel? must she enamel? must we enamel? must you enamel? must they enamel?	must I be enamelling? must you be enamelling? must she be enamelling? must we be enamelling? must you be enamelling? must they be enamelling?
Perfect	V-ing perfect
must I have enamelled? must you have enamelled? must she have enamelled? must we have enamelled? must you have enamelled? must they have enamelled?	must I have been enamelling? must you have been enamelling? must she have been enamelling? must we have been enamelling? must you have been enamelling? must they have been enamelling?

Interro-negative form

Simple form	V-ing form
mustn't I enamel? mustn't you enamel? mustn't she enamel? mustn't we enamel? mustn't you enamel? mustn't they enamel?	mustn't I be enamelling? mustn't you be enamelling? mustn't she be enamelling? mustn't we be enamelling? mustn't you be enamelling? mustn't they be enamelling?
Perfect	V-ing perfect
mustn't I have enamelled? mustn't you have enamelled? mustn't she have enamelled? mustn't we have enamelled? mustn't you have enamelled? mustn't they have enamelled?	mustn't I have been enamelling? mustn't you have been enamelling? mustn't she have been enamelling? mustn't we have been enamelling? mustn't you have been enamelling? mustn't they have been enamelling?