must counterclaim
Verbo regular: counterclaim - counterclaimed- counterclaimed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must counterclaim
you must counterclaim
he must counterclaim
we must counterclaim
you must counterclaim
they must counterclaim 	I must be counterclaiming
you must be counterclaiming
he must be counterclaiming
we must be counterclaiming
you must be counterclaiming
they must be counterclaiming	I must have counterclaimed
you must have counterclaimed
he must have counterclaimed
we must have counterclaimed
you must have counterclaimed
they must have counterclaimed	I must have been counterclaiming
you must have been counterclaiming
he must have been counterclaiming
we must have been counterclaiming
you must have been counterclaiming
they must have been counterclaiming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't counterclaim
you mustn't counterclaim
he mustn't counterclaim
we mustn't counterclaim
you mustn't counterclaim
they mustn't counterclaim 	I mustn't be counterclaiming
you mustn't be counterclaiming
he mustn't be counterclaiming
we mustn't be counterclaiming
you mustn't be counterclaiming
they mustn't be counterclaiming	I mustn't have counterclaimed
you mustn't have counterclaimed
he mustn't have counterclaimed
we mustn't have counterclaimed
you mustn't have counterclaimed
they mustn't have counterclaimed	I mustn't have been counterclaiming
you mustn't have been counterclaiming
he mustn't have been counterclaiming
we mustn't have been counterclaiming
you mustn't have been counterclaiming
they mustn't have been counterclaiming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I counterclaim?
must you counterclaim?
must he counterclaim?
must we counterclaim?
must you counterclaim?
must they counterclaim? 	must I be counterclaiming?
must you be counterclaiming?
must he be counterclaiming?
must we be counterclaiming?
must you be counterclaiming?
must they be counterclaiming? 	must I have counterclaimed?
must you have counterclaimed?
must he have counterclaimed?
must we have counterclaimed?
must you have counterclaimed?
must they have counterclaimed? 	must I have been counterclaiming?
must you have been counterclaiming?
must he have been counterclaiming?
must we have been counterclaiming?
must you have been counterclaiming?
must they have been counterclaiming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I counterclaim?
mustn't you counterclaim?
mustn't he counterclaim?
mustn't we counterclaim?
mustn't you counterclaim?
mustn't they counterclaim? 	mustn't I be counterclaiming?
mustn't you be counterclaiming?
mustn't he be counterclaiming?
mustn't we be counterclaiming?
mustn't you be counterclaiming?
mustn't they be counterclaiming? 	mustn't I have counterclaimed?
mustn't you have counterclaimed?
mustn't he have counterclaimed?
mustn't we have counterclaimed?
mustn't you have counterclaimed?
mustn't they have counterclaimed? 	mustn't I have been counterclaiming?
mustn't you have been counterclaiming?
mustn't he have been counterclaiming?
mustn't we have been counterclaiming?
mustn't you have been counterclaiming?
mustn't they have been counterclaiming?