English verb conjugation
MUST COLLABORATE

Regular verb: collaborate - collaborated - collaborated

Affirmation

Simple form	V-ing form
I must collaborate you must collaborate he must collaborate we must collaborate you must collaborate they must collaborate	I must be collaborating you must be collaborating he must be collaborating we must be collaborating you must be collaborating they must be collaborating
Perfect	V-ing perfect
I must have collaborated you must have collaborated he must have collaborated we must have collaborated you must have collaborated they must have collaborated	I must have been collaborating you must have been collaborating he must have been collaborating we must have been collaborating you must have been collaborating they must have been collaborating

Negation

Simple form	V-ing form
I mustn't collaborate you mustn't collaborate he mustn't collaborate we mustn't collaborate you mustn't collaborate they mustn't collaborate	I mustn't be collaborating you mustn't be collaborating he mustn't be collaborating we mustn't be collaborating you mustn't be collaborating they mustn't be collaborating
Perfect	V-ing perfect
I mustn't have collaborated you mustn't have collaborated he mustn't have collaborated we mustn't have collaborated you mustn't have collaborated they mustn't have collaborated	I mustn't have been collaborating you mustn't have been collaborating he mustn't have been collaborating we mustn't have been collaborating you mustn't have been collaborating they mustn't have been collaborating

Interrogative form

Simple form	V-ing form
must I collaborate? must you collaborate? must he collaborate? must we collaborate? must you collaborate? must they collaborate?	must I be collaborating? must you be collaborating? must he be collaborating? must we be collaborating? must you be collaborating? must they be collaborating?
Perfect	V-ing perfect
must I have collaborated? must you have collaborated? must he have collaborated? must we have collaborated? must you have collaborated? must they have collaborated?	must I have been collaborating? must you have been collaborating? must he have been collaborating? must we have been collaborating? must you have been collaborating? must they have been collaborating?

Interro-negative form

Simple form	V-ing form
mustn't I collaborate? mustn't you collaborate? mustn't he collaborate? mustn't we collaborate? mustn't you collaborate? mustn't they collaborate?	mustn't I be collaborating? mustn't you be collaborating? mustn't he be collaborating? mustn't we be collaborating? mustn't you be collaborating? mustn't they be collaborating?
Perfect	V-ing perfect
mustn't I have collaborated? mustn't you have collaborated? mustn't he have collaborated? mustn't we have collaborated? mustn't you have collaborated? mustn't they have collaborated?	mustn't I have been collaborating? mustn't you have been collaborating? mustn't he have been collaborating? mustn't we have been collaborating? mustn't you have been collaborating? mustn't they have been collaborating?