English verb conjugation
MUST DECREPITATE

Regular verb: decrepitate - decrepitated - decrepitated

Affirmation

Simple form	V-ing form
I must decrepitate you must decrepitate he must decrepitate we must decrepitate you must decrepitate they must decrepitate	I must be decrepitating you must be decrepitating he must be decrepitating we must be decrepitating you must be decrepitating they must be decrepitating
Perfect	V-ing perfect
I must have decrepitated you must have decrepitated he must have decrepitated we must have decrepitated you must have decrepitated they must have decrepitated	I must have been decrepitating you must have been decrepitating he must have been decrepitating we must have been decrepitating you must have been decrepitating they must have been decrepitating

Negation

Simple form	V-ing form
I mustn't decrepitate you mustn't decrepitate he mustn't decrepitate we mustn't decrepitate you mustn't decrepitate they mustn't decrepitate	I mustn't be decrepitating you mustn't be decrepitating he mustn't be decrepitating we mustn't be decrepitating you mustn't be decrepitating they mustn't be decrepitating
Perfect	V-ing perfect
I mustn't have decrepitated you mustn't have decrepitated he mustn't have decrepitated we mustn't have decrepitated you mustn't have decrepitated they mustn't have decrepitated	I mustn't have been decrepitating you mustn't have been decrepitating he mustn't have been decrepitating we mustn't have been decrepitating you mustn't have been decrepitating they mustn't have been decrepitating

Interrogative form

Simple form	V-ing form
must I decrepitate? must you decrepitate? must he decrepitate? must we decrepitate? must you decrepitate? must they decrepitate?	must I be decrepitating? must you be decrepitating? must he be decrepitating? must we be decrepitating? must you be decrepitating? must they be decrepitating?
Perfect	V-ing perfect
must I have decrepitated? must you have decrepitated? must he have decrepitated? must we have decrepitated? must you have decrepitated? must they have decrepitated?	must I have been decrepitating? must you have been decrepitating? must he have been decrepitating? must we have been decrepitating? must you have been decrepitating? must they have been decrepitating?

Interro-negative form

Simple form	V-ing form
mustn't I decrepitate? mustn't you decrepitate? mustn't he decrepitate? mustn't we decrepitate? mustn't you decrepitate? mustn't they decrepitate?	mustn't I be decrepitating? mustn't you be decrepitating? mustn't he be decrepitating? mustn't we be decrepitating? mustn't you be decrepitating? mustn't they be decrepitating?
Perfect	V-ing perfect
mustn't I have decrepitated? mustn't you have decrepitated? mustn't he have decrepitated? mustn't we have decrepitated? mustn't you have decrepitated? mustn't they have decrepitated?	mustn't I have been decrepitating? mustn't you have been decrepitating? mustn't he have been decrepitating? mustn't we have been decrepitating? mustn't you have been decrepitating? mustn't they have been decrepitating?