English verb conjugation
MUST DISGRUNTLE

Regular verb: disgruntle - disgruntled - disgruntled

Affirmation

Simple form	V-ing form
I must disgruntle you must disgruntle he must disgruntle we must disgruntle you must disgruntle they must disgruntle	I must be disgruntling you must be disgruntling he must be disgruntling we must be disgruntling you must be disgruntling they must be disgruntling
Perfect	V-ing perfect
I must have disgruntled you must have disgruntled he must have disgruntled we must have disgruntled you must have disgruntled they must have disgruntled	I must have been disgruntling you must have been disgruntling he must have been disgruntling we must have been disgruntling you must have been disgruntling they must have been disgruntling

Negation

Simple form	V-ing form
I mustn't disgruntle you mustn't disgruntle he mustn't disgruntle we mustn't disgruntle you mustn't disgruntle they mustn't disgruntle	I mustn't be disgruntling you mustn't be disgruntling he mustn't be disgruntling we mustn't be disgruntling you mustn't be disgruntling they mustn't be disgruntling
Perfect	V-ing perfect
I mustn't have disgruntled you mustn't have disgruntled he mustn't have disgruntled we mustn't have disgruntled you mustn't have disgruntled they mustn't have disgruntled	I mustn't have been disgruntling you mustn't have been disgruntling he mustn't have been disgruntling we mustn't have been disgruntling you mustn't have been disgruntling they mustn't have been disgruntling

Interrogative form

Simple form	V-ing form
must I disgruntle? must you disgruntle? must he disgruntle? must we disgruntle? must you disgruntle? must they disgruntle?	must I be disgruntling? must you be disgruntling? must he be disgruntling? must we be disgruntling? must you be disgruntling? must they be disgruntling?
Perfect	V-ing perfect
must I have disgruntled? must you have disgruntled? must he have disgruntled? must we have disgruntled? must you have disgruntled? must they have disgruntled?	must I have been disgruntling? must you have been disgruntling? must he have been disgruntling? must we have been disgruntling? must you have been disgruntling? must they have been disgruntling?

Interro-negative form

Simple form	V-ing form
mustn't I disgruntle? mustn't you disgruntle? mustn't he disgruntle? mustn't we disgruntle? mustn't you disgruntle? mustn't they disgruntle?	mustn't I be disgruntling? mustn't you be disgruntling? mustn't he be disgruntling? mustn't we be disgruntling? mustn't you be disgruntling? mustn't they be disgruntling?
Perfect	V-ing perfect
mustn't I have disgruntled? mustn't you have disgruntled? mustn't he have disgruntled? mustn't we have disgruntled? mustn't you have disgruntled? mustn't they have disgruntled?	mustn't I have been disgruntling? mustn't you have been disgruntling? mustn't he have been disgruntling? mustn't we have been disgruntling? mustn't you have been disgruntling? mustn't they have been disgruntling?