must decline
Verbo regular: decline - declined- declined

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must decline
you must decline
he must decline
we must decline
you must decline
they must decline 	I must be declining
you must be declining
he must be declining
we must be declining
you must be declining
they must be declining	I must have declined
you must have declined
he must have declined
we must have declined
you must have declined
they must have declined	I must have been declining
you must have been declining
he must have been declining
we must have been declining
you must have been declining
they must have been declining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't decline
you mustn't decline
he mustn't decline
we mustn't decline
you mustn't decline
they mustn't decline 	I mustn't be declining
you mustn't be declining
he mustn't be declining
we mustn't be declining
you mustn't be declining
they mustn't be declining	I mustn't have declined
you mustn't have declined
he mustn't have declined
we mustn't have declined
you mustn't have declined
they mustn't have declined	I mustn't have been declining
you mustn't have been declining
he mustn't have been declining
we mustn't have been declining
you mustn't have been declining
they mustn't have been declining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I decline?
must you decline?
must he decline?
must we decline?
must you decline?
must they decline? 	must I be declining?
must you be declining?
must he be declining?
must we be declining?
must you be declining?
must they be declining? 	must I have declined?
must you have declined?
must he have declined?
must we have declined?
must you have declined?
must they have declined? 	must I have been declining?
must you have been declining?
must he have been declining?
must we have been declining?
must you have been declining?
must they have been declining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I decline?
mustn't you decline?
mustn't he decline?
mustn't we decline?
mustn't you decline?
mustn't they decline? 	mustn't I be declining?
mustn't you be declining?
mustn't he be declining?
mustn't we be declining?
mustn't you be declining?
mustn't they be declining? 	mustn't I have declined?
mustn't you have declined?
mustn't he have declined?
mustn't we have declined?
mustn't you have declined?
mustn't they have declined? 	mustn't I have been declining?
mustn't you have been declining?
mustn't he have been declining?
mustn't we have been declining?
mustn't you have been declining?
mustn't they have been declining?