must buckle
Verbe régulier : buckle - buckled- buckled
Traduction française : se boucler - boucler 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must buckle
you must buckle
she must buckle
we must buckle
you must buckle
they must buckle 	I must be buckling
you must be buckling
she must be buckling
we must be buckling
you must be buckling
they must be buckling	I must have buckled
you must have buckled
she must have buckled
we must have buckled
you must have buckled
they must have buckled	I must have been buckling
you must have been buckling
she must have been buckling
we must have been buckling
you must have been buckling
they must have been buckling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't buckle
you mustn't buckle
she mustn't buckle
we mustn't buckle
you mustn't buckle
they mustn't buckle 	I mustn't be buckling
you mustn't be buckling
she mustn't be buckling
we mustn't be buckling
you mustn't be buckling
they mustn't be buckling	I mustn't have buckled
you mustn't have buckled
she mustn't have buckled
we mustn't have buckled
you mustn't have buckled
they mustn't have buckled	I mustn't have been buckling
you mustn't have been buckling
she mustn't have been buckling
we mustn't have been buckling
you mustn't have been buckling
they mustn't have been buckling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I buckle?
must you buckle?
must she buckle?
must we buckle?
must you buckle?
must they buckle? 	must I be buckling?
must you be buckling?
must she be buckling?
must we be buckling?
must you be buckling?
must they be buckling? 	must I have buckled?
must you have buckled?
must she have buckled?
must we have buckled?
must you have buckled?
must they have buckled? 	must I have been buckling?
must you have been buckling?
must she have been buckling?
must we have been buckling?
must you have been buckling?
must they have been buckling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I buckle?
mustn't you buckle?
mustn't she buckle?
mustn't we buckle?
mustn't you buckle?
mustn't they buckle? 	mustn't I be buckling?
mustn't you be buckling?
mustn't she be buckling?
mustn't we be buckling?
mustn't you be buckling?
mustn't they be buckling? 	mustn't I have buckled?
mustn't you have buckled?
mustn't she have buckled?
mustn't we have buckled?
mustn't you have buckled?
mustn't they have buckled? 	mustn't I have been buckling?
mustn't you have been buckling?
mustn't she have been buckling?
mustn't we have been buckling?
mustn't you have been buckling?
mustn't they have been buckling?