must buck
Verbe régulier : buck - bucked- bucked
Traduction française : donner une ruade - désarçonner 

Affirmation 	
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I must buck
you must buck
she must buck
we must buck
you must buck
they must buck 	I must be bucking
you must be bucking
she must be bucking
we must be bucking
you must be bucking
they must be bucking	I must have bucked
you must have bucked
she must have bucked
we must have bucked
you must have bucked
they must have bucked	I must have been bucking
you must have been bucking
she must have been bucking
we must have been bucking
you must have been bucking
they must have been bucking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't buck
you mustn't buck
she mustn't buck
we mustn't buck
you mustn't buck
they mustn't buck 	I mustn't be bucking
you mustn't be bucking
she mustn't be bucking
we mustn't be bucking
you mustn't be bucking
they mustn't be bucking	I mustn't have bucked
you mustn't have bucked
she mustn't have bucked
we mustn't have bucked
you mustn't have bucked
they mustn't have bucked	I mustn't have been bucking
you mustn't have been bucking
she mustn't have been bucking
we mustn't have been bucking
you mustn't have been bucking
they mustn't have been bucking	

Forme interrogative 	
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must I buck?
must you buck?
must she buck?
must we buck?
must you buck?
must they buck? 	must I be bucking?
must you be bucking?
must she be bucking?
must we be bucking?
must you be bucking?
must they be bucking? 	must I have bucked?
must you have bucked?
must she have bucked?
must we have bucked?
must you have bucked?
must they have bucked? 	must I have been bucking?
must you have been bucking?
must she have been bucking?
must we have been bucking?
must you have been bucking?
must they have been bucking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I buck?
mustn't you buck?
mustn't she buck?
mustn't we buck?
mustn't you buck?
mustn't they buck? 	mustn't I be bucking?
mustn't you be bucking?
mustn't she be bucking?
mustn't we be bucking?
mustn't you be bucking?
mustn't they be bucking? 	mustn't I have bucked?
mustn't you have bucked?
mustn't she have bucked?
mustn't we have bucked?
mustn't you have bucked?
mustn't they have bucked? 	mustn't I have been bucking?
mustn't you have been bucking?
mustn't she have been bucking?
mustn't we have been bucking?
mustn't you have been bucking?
mustn't they have been bucking?