English verb conjugation
MUST QUAKE

Regular verb: quake - quaked - quaked

Affirmation

Simple form	V-ing form
I must quake you must quake he must quake we must quake you must quake they must quake	I must be quaking you must be quaking he must be quaking we must be quaking you must be quaking they must be quaking
Perfect	V-ing perfect
I must have quaked you must have quaked he must have quaked we must have quaked you must have quaked they must have quaked	I must have been quaking you must have been quaking he must have been quaking we must have been quaking you must have been quaking they must have been quaking

Negation

Simple form	V-ing form
I mustn't quake you mustn't quake he mustn't quake we mustn't quake you mustn't quake they mustn't quake	I mustn't be quaking you mustn't be quaking he mustn't be quaking we mustn't be quaking you mustn't be quaking they mustn't be quaking
Perfect	V-ing perfect
I mustn't have quaked you mustn't have quaked he mustn't have quaked we mustn't have quaked you mustn't have quaked they mustn't have quaked	I mustn't have been quaking you mustn't have been quaking he mustn't have been quaking we mustn't have been quaking you mustn't have been quaking they mustn't have been quaking

Interrogative form

Simple form	V-ing form
must I quake? must you quake? must he quake? must we quake? must you quake? must they quake?	must I be quaking? must you be quaking? must he be quaking? must we be quaking? must you be quaking? must they be quaking?
Perfect	V-ing perfect
must I have quaked? must you have quaked? must he have quaked? must we have quaked? must you have quaked? must they have quaked?	must I have been quaking? must you have been quaking? must he have been quaking? must we have been quaking? must you have been quaking? must they have been quaking?

Interro-negative form

Simple form	V-ing form
mustn't I quake? mustn't you quake? mustn't he quake? mustn't we quake? mustn't you quake? mustn't they quake?	mustn't I be quaking? mustn't you be quaking? mustn't he be quaking? mustn't we be quaking? mustn't you be quaking? mustn't they be quaking?
Perfect	V-ing perfect
mustn't I have quaked? mustn't you have quaked? mustn't he have quaked? mustn't we have quaked? mustn't you have quaked? mustn't they have quaked?	mustn't I have been quaking? mustn't you have been quaking? mustn't he have been quaking? mustn't we have been quaking? mustn't you have been quaking? mustn't they have been quaking?