must pump
Verbe régulier : pump - pumped- pumped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must pump
you must pump
she must pump
we must pump
you must pump
they must pump 	I must be pumping
you must be pumping
she must be pumping
we must be pumping
you must be pumping
they must be pumping	I must have pumped
you must have pumped
she must have pumped
we must have pumped
you must have pumped
they must have pumped	I must have been pumping
you must have been pumping
she must have been pumping
we must have been pumping
you must have been pumping
they must have been pumping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't pump
you mustn't pump
she mustn't pump
we mustn't pump
you mustn't pump
they mustn't pump 	I mustn't be pumping
you mustn't be pumping
she mustn't be pumping
we mustn't be pumping
you mustn't be pumping
they mustn't be pumping	I mustn't have pumped
you mustn't have pumped
she mustn't have pumped
we mustn't have pumped
you mustn't have pumped
they mustn't have pumped	I mustn't have been pumping
you mustn't have been pumping
she mustn't have been pumping
we mustn't have been pumping
you mustn't have been pumping
they mustn't have been pumping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I pump?
must you pump?
must she pump?
must we pump?
must you pump?
must they pump? 	must I be pumping?
must you be pumping?
must she be pumping?
must we be pumping?
must you be pumping?
must they be pumping? 	must I have pumped?
must you have pumped?
must she have pumped?
must we have pumped?
must you have pumped?
must they have pumped? 	must I have been pumping?
must you have been pumping?
must she have been pumping?
must we have been pumping?
must you have been pumping?
must they have been pumping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I pump?
mustn't you pump?
mustn't she pump?
mustn't we pump?
mustn't you pump?
mustn't they pump? 	mustn't I be pumping?
mustn't you be pumping?
mustn't she be pumping?
mustn't we be pumping?
mustn't you be pumping?
mustn't they be pumping? 	mustn't I have pumped?
mustn't you have pumped?
mustn't she have pumped?
mustn't we have pumped?
mustn't you have pumped?
mustn't they have pumped? 	mustn't I have been pumping?
mustn't you have been pumping?
mustn't she have been pumping?
mustn't we have been pumping?
mustn't you have been pumping?
mustn't they have been pumping?