must quip
Regular verb: quip - quipped- quipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must quip
you must quip
he must quip
we must quip
you must quip
they must quip 	I must be quipping
you must be quipping
he must be quipping
we must be quipping
you must be quipping
they must be quipping	I must have quipped
you must have quipped
he must have quipped
we must have quipped
you must have quipped
they must have quipped	I must have been quipping
you must have been quipping
he must have been quipping
we must have been quipping
you must have been quipping
they must have been quipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't quip
you mustn't quip
he mustn't quip
we mustn't quip
you mustn't quip
they mustn't quip 	I mustn't be quipping
you mustn't be quipping
he mustn't be quipping
we mustn't be quipping
you mustn't be quipping
they mustn't be quipping	I mustn't have quipped
you mustn't have quipped
he mustn't have quipped
we mustn't have quipped
you mustn't have quipped
they mustn't have quipped	I mustn't have been quipping
you mustn't have been quipping
he mustn't have been quipping
we mustn't have been quipping
you mustn't have been quipping
they mustn't have been quipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I quip?
must you quip?
must he quip?
must we quip?
must you quip?
must they quip? 	must I be quipping?
must you be quipping?
must he be quipping?
must we be quipping?
must you be quipping?
must they be quipping? 	must I have quipped?
must you have quipped?
must he have quipped?
must we have quipped?
must you have quipped?
must they have quipped? 	must I have been quipping?
must you have been quipping?
must he have been quipping?
must we have been quipping?
must you have been quipping?
must they have been quipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I quip?
mustn't you quip?
mustn't he quip?
mustn't we quip?
mustn't you quip?
mustn't they quip? 	mustn't I be quipping?
mustn't you be quipping?
mustn't he be quipping?
mustn't we be quipping?
mustn't you be quipping?
mustn't they be quipping? 	mustn't I have quipped?
mustn't you have quipped?
mustn't he have quipped?
mustn't we have quipped?
mustn't you have quipped?
mustn't they have quipped? 	mustn't I have been quipping?
mustn't you have been quipping?
mustn't he have been quipping?
mustn't we have been quipping?
mustn't you have been quipping?
mustn't they have been quipping?