must yawp
Verbe régulier : yawp - yawped- yawped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must yawp
you must yawp
she must yawp
we must yawp
you must yawp
they must yawp 	I must be yawping
you must be yawping
she must be yawping
we must be yawping
you must be yawping
they must be yawping	I must have yawped
you must have yawped
she must have yawped
we must have yawped
you must have yawped
they must have yawped	I must have been yawping
you must have been yawping
she must have been yawping
we must have been yawping
you must have been yawping
they must have been yawping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't yawp
you mustn't yawp
she mustn't yawp
we mustn't yawp
you mustn't yawp
they mustn't yawp 	I mustn't be yawping
you mustn't be yawping
she mustn't be yawping
we mustn't be yawping
you mustn't be yawping
they mustn't be yawping	I mustn't have yawped
you mustn't have yawped
she mustn't have yawped
we mustn't have yawped
you mustn't have yawped
they mustn't have yawped	I mustn't have been yawping
you mustn't have been yawping
she mustn't have been yawping
we mustn't have been yawping
you mustn't have been yawping
they mustn't have been yawping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I yawp?
must you yawp?
must she yawp?
must we yawp?
must you yawp?
must they yawp? 	must I be yawping?
must you be yawping?
must she be yawping?
must we be yawping?
must you be yawping?
must they be yawping? 	must I have yawped?
must you have yawped?
must she have yawped?
must we have yawped?
must you have yawped?
must they have yawped? 	must I have been yawping?
must you have been yawping?
must she have been yawping?
must we have been yawping?
must you have been yawping?
must they have been yawping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I yawp?
mustn't you yawp?
mustn't she yawp?
mustn't we yawp?
mustn't you yawp?
mustn't they yawp? 	mustn't I be yawping?
mustn't you be yawping?
mustn't she be yawping?
mustn't we be yawping?
mustn't you be yawping?
mustn't they be yawping? 	mustn't I have yawped?
mustn't you have yawped?
mustn't she have yawped?
mustn't we have yawped?
mustn't you have yawped?
mustn't they have yawped? 	mustn't I have been yawping?
mustn't you have been yawping?
mustn't she have been yawping?
mustn't we have been yawping?
mustn't you have been yawping?
mustn't they have been yawping?