must plunder
Regular verb: plunder - plundered- plundered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must plunder
you must plunder
she must plunder
we must plunder
you must plunder
they must plunder 	I must be plundering
you must be plundering
she must be plundering
we must be plundering
you must be plundering
they must be plundering	I must have plundered
you must have plundered
she must have plundered
we must have plundered
you must have plundered
they must have plundered	I must have been plundering
you must have been plundering
she must have been plundering
we must have been plundering
you must have been plundering
they must have been plundering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't plunder
you mustn't plunder
she mustn't plunder
we mustn't plunder
you mustn't plunder
they mustn't plunder 	I mustn't be plundering
you mustn't be plundering
she mustn't be plundering
we mustn't be plundering
you mustn't be plundering
they mustn't be plundering	I mustn't have plundered
you mustn't have plundered
she mustn't have plundered
we mustn't have plundered
you mustn't have plundered
they mustn't have plundered	I mustn't have been plundering
you mustn't have been plundering
she mustn't have been plundering
we mustn't have been plundering
you mustn't have been plundering
they mustn't have been plundering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I plunder?
must you plunder?
must she plunder?
must we plunder?
must you plunder?
must they plunder? 	must I be plundering?
must you be plundering?
must she be plundering?
must we be plundering?
must you be plundering?
must they be plundering? 	must I have plundered?
must you have plundered?
must she have plundered?
must we have plundered?
must you have plundered?
must they have plundered? 	must I have been plundering?
must you have been plundering?
must she have been plundering?
must we have been plundering?
must you have been plundering?
must they have been plundering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I plunder?
mustn't you plunder?
mustn't she plunder?
mustn't we plunder?
mustn't you plunder?
mustn't they plunder? 	mustn't I be plundering?
mustn't you be plundering?
mustn't she be plundering?
mustn't we be plundering?
mustn't you be plundering?
mustn't they be plundering? 	mustn't I have plundered?
mustn't you have plundered?
mustn't she have plundered?
mustn't we have plundered?
mustn't you have plundered?
mustn't they have plundered? 	mustn't I have been plundering?
mustn't you have been plundering?
mustn't she have been plundering?
mustn't we have been plundering?
mustn't you have been plundering?
mustn't they have been plundering?