English verb conjugation
MUST SPEARHEAD

Regular verb: spearhead - spearheaded - spearheaded

Affirmation

Simple form	V-ing form
I must spearhead you must spearhead she must spearhead we must spearhead you must spearhead they must spearhead	I must be spearheading you must be spearheading she must be spearheading we must be spearheading you must be spearheading they must be spearheading
Perfect	V-ing perfect
I must have spearheaded you must have spearheaded she must have spearheaded we must have spearheaded you must have spearheaded they must have spearheaded	I must have been spearheading you must have been spearheading she must have been spearheading we must have been spearheading you must have been spearheading they must have been spearheading

Negation

Simple form	V-ing form
I mustn't spearhead you mustn't spearhead she mustn't spearhead we mustn't spearhead you mustn't spearhead they mustn't spearhead	I mustn't be spearheading you mustn't be spearheading she mustn't be spearheading we mustn't be spearheading you mustn't be spearheading they mustn't be spearheading
Perfect	V-ing perfect
I mustn't have spearheaded you mustn't have spearheaded she mustn't have spearheaded we mustn't have spearheaded you mustn't have spearheaded they mustn't have spearheaded	I mustn't have been spearheading you mustn't have been spearheading she mustn't have been spearheading we mustn't have been spearheading you mustn't have been spearheading they mustn't have been spearheading

Interrogative form

Simple form	V-ing form
must I spearhead? must you spearhead? must she spearhead? must we spearhead? must you spearhead? must they spearhead?	must I be spearheading? must you be spearheading? must she be spearheading? must we be spearheading? must you be spearheading? must they be spearheading?
Perfect	V-ing perfect
must I have spearheaded? must you have spearheaded? must she have spearheaded? must we have spearheaded? must you have spearheaded? must they have spearheaded?	must I have been spearheading? must you have been spearheading? must she have been spearheading? must we have been spearheading? must you have been spearheading? must they have been spearheading?

Interro-negative form

Simple form	V-ing form
mustn't I spearhead? mustn't you spearhead? mustn't she spearhead? mustn't we spearhead? mustn't you spearhead? mustn't they spearhead?	mustn't I be spearheading? mustn't you be spearheading? mustn't she be spearheading? mustn't we be spearheading? mustn't you be spearheading? mustn't they be spearheading?
Perfect	V-ing perfect
mustn't I have spearheaded? mustn't you have spearheaded? mustn't she have spearheaded? mustn't we have spearheaded? mustn't you have spearheaded? mustn't they have spearheaded?	mustn't I have been spearheading? mustn't you have been spearheading? mustn't she have been spearheading? mustn't we have been spearheading? mustn't you have been spearheading? mustn't they have been spearheading?