must counterstep
Verbe régulier : counterstep - countersteped- countersteped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must counterstep
you must counterstep
she must counterstep
we must counterstep
you must counterstep
they must counterstep 	I must be countersteping
you must be countersteping
she must be countersteping
we must be countersteping
you must be countersteping
they must be countersteping	I must have countersteped
you must have countersteped
she must have countersteped
we must have countersteped
you must have countersteped
they must have countersteped	I must have been countersteping
you must have been countersteping
she must have been countersteping
we must have been countersteping
you must have been countersteping
they must have been countersteping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't counterstep
you mustn't counterstep
she mustn't counterstep
we mustn't counterstep
you mustn't counterstep
they mustn't counterstep 	I mustn't be countersteping
you mustn't be countersteping
she mustn't be countersteping
we mustn't be countersteping
you mustn't be countersteping
they mustn't be countersteping	I mustn't have countersteped
you mustn't have countersteped
she mustn't have countersteped
we mustn't have countersteped
you mustn't have countersteped
they mustn't have countersteped	I mustn't have been countersteping
you mustn't have been countersteping
she mustn't have been countersteping
we mustn't have been countersteping
you mustn't have been countersteping
they mustn't have been countersteping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I counterstep?
must you counterstep?
must she counterstep?
must we counterstep?
must you counterstep?
must they counterstep? 	must I be countersteping?
must you be countersteping?
must she be countersteping?
must we be countersteping?
must you be countersteping?
must they be countersteping? 	must I have countersteped?
must you have countersteped?
must she have countersteped?
must we have countersteped?
must you have countersteped?
must they have countersteped? 	must I have been countersteping?
must you have been countersteping?
must she have been countersteping?
must we have been countersteping?
must you have been countersteping?
must they have been countersteping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I counterstep?
mustn't you counterstep?
mustn't she counterstep?
mustn't we counterstep?
mustn't you counterstep?
mustn't they counterstep? 	mustn't I be countersteping?
mustn't you be countersteping?
mustn't she be countersteping?
mustn't we be countersteping?
mustn't you be countersteping?
mustn't they be countersteping? 	mustn't I have countersteped?
mustn't you have countersteped?
mustn't she have countersteped?
mustn't we have countersteped?
mustn't you have countersteped?
mustn't they have countersteped? 	mustn't I have been countersteping?
mustn't you have been countersteping?
mustn't she have been countersteping?
mustn't we have been countersteping?
mustn't you have been countersteping?
mustn't they have been countersteping?