must nip
Verbo regular: nip - nipped- nipped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must nip
you must nip
he must nip
we must nip
you must nip
they must nip 	I must be nipping
you must be nipping
he must be nipping
we must be nipping
you must be nipping
they must be nipping	I must have nipped
you must have nipped
he must have nipped
we must have nipped
you must have nipped
they must have nipped	I must have been nipping
you must have been nipping
he must have been nipping
we must have been nipping
you must have been nipping
they must have been nipping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't nip
you mustn't nip
he mustn't nip
we mustn't nip
you mustn't nip
they mustn't nip 	I mustn't be nipping
you mustn't be nipping
he mustn't be nipping
we mustn't be nipping
you mustn't be nipping
they mustn't be nipping	I mustn't have nipped
you mustn't have nipped
he mustn't have nipped
we mustn't have nipped
you mustn't have nipped
they mustn't have nipped	I mustn't have been nipping
you mustn't have been nipping
he mustn't have been nipping
we mustn't have been nipping
you mustn't have been nipping
they mustn't have been nipping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I nip?
must you nip?
must he nip?
must we nip?
must you nip?
must they nip? 	must I be nipping?
must you be nipping?
must he be nipping?
must we be nipping?
must you be nipping?
must they be nipping? 	must I have nipped?
must you have nipped?
must he have nipped?
must we have nipped?
must you have nipped?
must they have nipped? 	must I have been nipping?
must you have been nipping?
must he have been nipping?
must we have been nipping?
must you have been nipping?
must they have been nipping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I nip?
mustn't you nip?
mustn't he nip?
mustn't we nip?
mustn't you nip?
mustn't they nip? 	mustn't I be nipping?
mustn't you be nipping?
mustn't he be nipping?
mustn't we be nipping?
mustn't you be nipping?
mustn't they be nipping? 	mustn't I have nipped?
mustn't you have nipped?
mustn't he have nipped?
mustn't we have nipped?
mustn't you have nipped?
mustn't they have nipped? 	mustn't I have been nipping?
mustn't you have been nipping?
mustn't he have been nipping?
mustn't we have been nipping?
mustn't you have been nipping?
mustn't they have been nipping?