Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must gronder passer you must gronder passer he must gronder passer we must gronder passer you must gronder passer they must gronder passer
V-ing form
I must be gronder passering you must be gronder passering he must be gronder passering we must be gronder passering you must be gronder passering they must be gronder passering
Perfect
I must have gronder passered you must have gronder passered he must have gronder passered we must have gronder passered you must have gronder passered they must have gronder passered
V-ing perfect
I must have been gronder passering you must have been gronder passering he must have been gronder passering we must have been gronder passering you must have been gronder passering they must have been gronder passering
Negation
Simple form
I mustn't gronder passer you mustn't gronder passer he mustn't gronder passer we mustn't gronder passer you mustn't gronder passer they mustn't gronder passer
V-ing form
I mustn't be gronder passering you mustn't be gronder passering he mustn't be gronder passering we mustn't be gronder passering you mustn't be gronder passering they mustn't be gronder passering
Perfect
I mustn't have gronder passered you mustn't have gronder passered he mustn't have gronder passered we mustn't have gronder passered you mustn't have gronder passered they mustn't have gronder passered
V-ing perfect
I mustn't have been gronder passering you mustn't have been gronder passering he mustn't have been gronder passering we mustn't have been gronder passering you mustn't have been gronder passering they mustn't have been gronder passering
Interrogative form
Simple form
must I gronder passer? must you gronder passer? must he gronder passer? must we gronder passer? must you gronder passer? must they gronder passer?
V-ing form
must I be gronder passering? must you be gronder passering? must he be gronder passering? must we be gronder passering? must you be gronder passering? must they be gronder passering?
Perfect
must I have gronder passered? must you have gronder passered? must he have gronder passered? must we have gronder passered? must you have gronder passered? must they have gronder passered?
V-ing perfect
must I have been gronder passering? must you have been gronder passering? must he have been gronder passering? must we have been gronder passering? must you have been gronder passering? must they have been gronder passering?
Interro-negative form
Simple form
mustn't I gronder passer? mustn't you gronder passer? mustn't he gronder passer? mustn't we gronder passer? mustn't you gronder passer? mustn't they gronder passer?
V-ing form
mustn't I be gronder passering? mustn't you be gronder passering? mustn't he be gronder passering? mustn't we be gronder passering? mustn't you be gronder passering? mustn't they be gronder passering?
Perfect
mustn't I have gronder passered? mustn't you have gronder passered? mustn't he have gronder passered? mustn't we have gronder passered? mustn't you have gronder passered? mustn't they have gronder passered?
V-ing perfect
mustn't I have been gronder passering? mustn't you have been gronder passering? mustn't he have been gronder passering? mustn't we have been gronder passering? mustn't you have been gronder passering? mustn't they have been gronder passering?