English verb conjugation
MUST EMBRITTLE

Regular verb: embrittle - embrittled - embrittled

Affirmation

Simple form	V-ing form
I must embrittle you must embrittle he must embrittle we must embrittle you must embrittle they must embrittle	I must be embrittling you must be embrittling he must be embrittling we must be embrittling you must be embrittling they must be embrittling
Perfect	V-ing perfect
I must have embrittled you must have embrittled he must have embrittled we must have embrittled you must have embrittled they must have embrittled	I must have been embrittling you must have been embrittling he must have been embrittling we must have been embrittling you must have been embrittling they must have been embrittling

Negation

Simple form	V-ing form
I mustn't embrittle you mustn't embrittle he mustn't embrittle we mustn't embrittle you mustn't embrittle they mustn't embrittle	I mustn't be embrittling you mustn't be embrittling he mustn't be embrittling we mustn't be embrittling you mustn't be embrittling they mustn't be embrittling
Perfect	V-ing perfect
I mustn't have embrittled you mustn't have embrittled he mustn't have embrittled we mustn't have embrittled you mustn't have embrittled they mustn't have embrittled	I mustn't have been embrittling you mustn't have been embrittling he mustn't have been embrittling we mustn't have been embrittling you mustn't have been embrittling they mustn't have been embrittling

Interrogative form

Simple form	V-ing form
must I embrittle? must you embrittle? must he embrittle? must we embrittle? must you embrittle? must they embrittle?	must I be embrittling? must you be embrittling? must he be embrittling? must we be embrittling? must you be embrittling? must they be embrittling?
Perfect	V-ing perfect
must I have embrittled? must you have embrittled? must he have embrittled? must we have embrittled? must you have embrittled? must they have embrittled?	must I have been embrittling? must you have been embrittling? must he have been embrittling? must we have been embrittling? must you have been embrittling? must they have been embrittling?

Interro-negative form

Simple form	V-ing form
mustn't I embrittle? mustn't you embrittle? mustn't he embrittle? mustn't we embrittle? mustn't you embrittle? mustn't they embrittle?	mustn't I be embrittling? mustn't you be embrittling? mustn't he be embrittling? mustn't we be embrittling? mustn't you be embrittling? mustn't they be embrittling?
Perfect	V-ing perfect
mustn't I have embrittled? mustn't you have embrittled? mustn't he have embrittled? mustn't we have embrittled? mustn't you have embrittled? mustn't they have embrittled?	mustn't I have been embrittling? mustn't you have been embrittling? mustn't he have been embrittling? mustn't we have been embrittling? mustn't you have been embrittling? mustn't they have been embrittling?