English verb conjugation
MUST CAPTAIN

Regular verb: captain - captained - captained

Affirmation

Simple form	V-ing form
I must captain you must captain he must captain we must captain you must captain they must captain	I must be captaining you must be captaining he must be captaining we must be captaining you must be captaining they must be captaining
Perfect	V-ing perfect
I must have captained you must have captained he must have captained we must have captained you must have captained they must have captained	I must have been captaining you must have been captaining he must have been captaining we must have been captaining you must have been captaining they must have been captaining

Negation

Simple form	V-ing form
I mustn't captain you mustn't captain he mustn't captain we mustn't captain you mustn't captain they mustn't captain	I mustn't be captaining you mustn't be captaining he mustn't be captaining we mustn't be captaining you mustn't be captaining they mustn't be captaining
Perfect	V-ing perfect
I mustn't have captained you mustn't have captained he mustn't have captained we mustn't have captained you mustn't have captained they mustn't have captained	I mustn't have been captaining you mustn't have been captaining he mustn't have been captaining we mustn't have been captaining you mustn't have been captaining they mustn't have been captaining

Interrogative form

Simple form	V-ing form
must I captain? must you captain? must he captain? must we captain? must you captain? must they captain?	must I be captaining? must you be captaining? must he be captaining? must we be captaining? must you be captaining? must they be captaining?
Perfect	V-ing perfect
must I have captained? must you have captained? must he have captained? must we have captained? must you have captained? must they have captained?	must I have been captaining? must you have been captaining? must he have been captaining? must we have been captaining? must you have been captaining? must they have been captaining?

Interro-negative form

Simple form	V-ing form
mustn't I captain? mustn't you captain? mustn't he captain? mustn't we captain? mustn't you captain? mustn't they captain?	mustn't I be captaining? mustn't you be captaining? mustn't he be captaining? mustn't we be captaining? mustn't you be captaining? mustn't they be captaining?
Perfect	V-ing perfect
mustn't I have captained? mustn't you have captained? mustn't he have captained? mustn't we have captained? mustn't you have captained? mustn't they have captained?	mustn't I have been captaining? mustn't you have been captaining? mustn't he have been captaining? mustn't we have been captaining? mustn't you have been captaining? mustn't they have been captaining?