I must discredit you must discredit he must discredit we must discredit you must discredit they must discredit
V-ing form
I must be discrediting you must be discrediting he must be discrediting we must be discrediting you must be discrediting they must be discrediting
Perfect
I must have discredited you must have discredited he must have discredited we must have discredited you must have discredited they must have discredited
V-ing perfect
I must have been discrediting you must have been discrediting he must have been discrediting we must have been discrediting you must have been discrediting they must have been discrediting
Negation
Simple form
I mustn't discredit you mustn't discredit he mustn't discredit we mustn't discredit you mustn't discredit they mustn't discredit
V-ing form
I mustn't be discrediting you mustn't be discrediting he mustn't be discrediting we mustn't be discrediting you mustn't be discrediting they mustn't be discrediting
Perfect
I mustn't have discredited you mustn't have discredited he mustn't have discredited we mustn't have discredited you mustn't have discredited they mustn't have discredited
V-ing perfect
I mustn't have been discrediting you mustn't have been discrediting he mustn't have been discrediting we mustn't have been discrediting you mustn't have been discrediting they mustn't have been discrediting
Interrogative form
Simple form
must I discredit? must you discredit? must he discredit? must we discredit? must you discredit? must they discredit?
V-ing form
must I be discrediting? must you be discrediting? must he be discrediting? must we be discrediting? must you be discrediting? must they be discrediting?
Perfect
must I have discredited? must you have discredited? must he have discredited? must we have discredited? must you have discredited? must they have discredited?
V-ing perfect
must I have been discrediting? must you have been discrediting? must he have been discrediting? must we have been discrediting? must you have been discrediting? must they have been discrediting?
Interro-negative form
Simple form
mustn't I discredit? mustn't you discredit? mustn't he discredit? mustn't we discredit? mustn't you discredit? mustn't they discredit?
V-ing form
mustn't I be discrediting? mustn't you be discrediting? mustn't he be discrediting? mustn't we be discrediting? mustn't you be discrediting? mustn't they be discrediting?
Perfect
mustn't I have discredited? mustn't you have discredited? mustn't he have discredited? mustn't we have discredited? mustn't you have discredited? mustn't they have discredited?
V-ing perfect
mustn't I have been discrediting? mustn't you have been discrediting? mustn't he have been discrediting? mustn't we have been discrediting? mustn't you have been discrediting? mustn't they have been discrediting?