must quake
Regular verb: quake - quaked- quaked

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