must concave
Verbe régulier : concave - concaved- concaved

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must concave
you must concave
she must concave
we must concave
you must concave
they must concave 	I must be concaving
you must be concaving
she must be concaving
we must be concaving
you must be concaving
they must be concaving	I must have concaved
you must have concaved
she must have concaved
we must have concaved
you must have concaved
they must have concaved	I must have been concaving
you must have been concaving
she must have been concaving
we must have been concaving
you must have been concaving
they must have been concaving	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't concave
you mustn't concave
she mustn't concave
we mustn't concave
you mustn't concave
they mustn't concave 	I mustn't be concaving
you mustn't be concaving
she mustn't be concaving
we mustn't be concaving
you mustn't be concaving
they mustn't be concaving	I mustn't have concaved
you mustn't have concaved
she mustn't have concaved
we mustn't have concaved
you mustn't have concaved
they mustn't have concaved	I mustn't have been concaving
you mustn't have been concaving
she mustn't have been concaving
we mustn't have been concaving
you mustn't have been concaving
they mustn't have been concaving	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I concave?
must you concave?
must she concave?
must we concave?
must you concave?
must they concave? 	must I be concaving?
must you be concaving?
must she be concaving?
must we be concaving?
must you be concaving?
must they be concaving? 	must I have concaved?
must you have concaved?
must she have concaved?
must we have concaved?
must you have concaved?
must they have concaved? 	must I have been concaving?
must you have been concaving?
must she have been concaving?
must we have been concaving?
must you have been concaving?
must they have been concaving? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I concave?
mustn't you concave?
mustn't she concave?
mustn't we concave?
mustn't you concave?
mustn't they concave? 	mustn't I be concaving?
mustn't you be concaving?
mustn't she be concaving?
mustn't we be concaving?
mustn't you be concaving?
mustn't they be concaving? 	mustn't I have concaved?
mustn't you have concaved?
mustn't she have concaved?
mustn't we have concaved?
mustn't you have concaved?
mustn't they have concaved? 	mustn't I have been concaving?
mustn't you have been concaving?
mustn't she have been concaving?
mustn't we have been concaving?
mustn't you have been concaving?
mustn't they have been concaving?