English verb conjugation
MUST DISCUSS

Regular verb: discuss - discussed - discussed

Affirmation

Simple form	V-ing form
I must discuss you must discuss she must discuss we must discuss you must discuss they must discuss	I must be discussing you must be discussing she must be discussing we must be discussing you must be discussing they must be discussing
Perfect	V-ing perfect
I must have discussed you must have discussed she must have discussed we must have discussed you must have discussed they must have discussed	I must have been discussing you must have been discussing she must have been discussing we must have been discussing you must have been discussing they must have been discussing

Negation

Simple form	V-ing form
I mustn't discuss you mustn't discuss she mustn't discuss we mustn't discuss you mustn't discuss they mustn't discuss	I mustn't be discussing you mustn't be discussing she mustn't be discussing we mustn't be discussing you mustn't be discussing they mustn't be discussing
Perfect	V-ing perfect
I mustn't have discussed you mustn't have discussed she mustn't have discussed we mustn't have discussed you mustn't have discussed they mustn't have discussed	I mustn't have been discussing you mustn't have been discussing she mustn't have been discussing we mustn't have been discussing you mustn't have been discussing they mustn't have been discussing

Interrogative form

Simple form	V-ing form
must I discuss? must you discuss? must she discuss? must we discuss? must you discuss? must they discuss?	must I be discussing? must you be discussing? must she be discussing? must we be discussing? must you be discussing? must they be discussing?
Perfect	V-ing perfect
must I have discussed? must you have discussed? must she have discussed? must we have discussed? must you have discussed? must they have discussed?	must I have been discussing? must you have been discussing? must she have been discussing? must we have been discussing? must you have been discussing? must they have been discussing?

Interro-negative form

Simple form	V-ing form
mustn't I discuss? mustn't you discuss? mustn't she discuss? mustn't we discuss? mustn't you discuss? mustn't they discuss?	mustn't I be discussing? mustn't you be discussing? mustn't she be discussing? mustn't we be discussing? mustn't you be discussing? mustn't they be discussing?
Perfect	V-ing perfect
mustn't I have discussed? mustn't you have discussed? mustn't she have discussed? mustn't we have discussed? mustn't you have discussed? mustn't they have discussed?	mustn't I have been discussing? mustn't you have been discussing? mustn't she have been discussing? mustn't we have been discussing? mustn't you have been discussing? mustn't they have been discussing?