English verb conjugation
MUST COLLABORATE

Regular verb: collaborate - collaborated - collaborated

Affirmation

Simple form	V-ing form
I must collaborate you must collaborate she must collaborate we must collaborate you must collaborate they must collaborate	I must be collaborating you must be collaborating she 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 she 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 she 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 she 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 she 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 she 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 she 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 she collaborate? must we collaborate? must you collaborate? must they collaborate?	must I be collaborating? must you be collaborating? must she 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 she 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 she 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 she 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 she 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 she 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 she have been collaborating? mustn't we have been collaborating? mustn't you have been collaborating? mustn't they have been collaborating?