must perpend
Regular verb: perpend - perpended- perpended

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must perpend
you must perpend
she must perpend
we must perpend
you must perpend
they must perpend 	I must be perpending
you must be perpending
she must be perpending
we must be perpending
you must be perpending
they must be perpending	I must have perpended
you must have perpended
she must have perpended
we must have perpended
you must have perpended
they must have perpended	I must have been perpending
you must have been perpending
she must have been perpending
we must have been perpending
you must have been perpending
they must have been perpending	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't perpend
you mustn't perpend
she mustn't perpend
we mustn't perpend
you mustn't perpend
they mustn't perpend 	I mustn't be perpending
you mustn't be perpending
she mustn't be perpending
we mustn't be perpending
you mustn't be perpending
they mustn't be perpending	I mustn't have perpended
you mustn't have perpended
she mustn't have perpended
we mustn't have perpended
you mustn't have perpended
they mustn't have perpended	I mustn't have been perpending
you mustn't have been perpending
she mustn't have been perpending
we mustn't have been perpending
you mustn't have been perpending
they mustn't have been perpending	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I perpend?
must you perpend?
must she perpend?
must we perpend?
must you perpend?
must they perpend? 	must I be perpending?
must you be perpending?
must she be perpending?
must we be perpending?
must you be perpending?
must they be perpending? 	must I have perpended?
must you have perpended?
must she have perpended?
must we have perpended?
must you have perpended?
must they have perpended? 	must I have been perpending?
must you have been perpending?
must she have been perpending?
must we have been perpending?
must you have been perpending?
must they have been perpending? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I perpend?
mustn't you perpend?
mustn't she perpend?
mustn't we perpend?
mustn't you perpend?
mustn't they perpend? 	mustn't I be perpending?
mustn't you be perpending?
mustn't she be perpending?
mustn't we be perpending?
mustn't you be perpending?
mustn't they be perpending? 	mustn't I have perpended?
mustn't you have perpended?
mustn't she have perpended?
mustn't we have perpended?
mustn't you have perpended?
mustn't they have perpended? 	mustn't I have been perpending?
mustn't you have been perpending?
mustn't she have been perpending?
mustn't we have been perpending?
mustn't you have been perpending?
mustn't they have been perpending?