must descend
Verbo regolare: descend - descended- descended

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must descend
you must descend
she must descend
we must descend
you must descend
they must descend 	I must be descending
you must be descending
she must be descending
we must be descending
you must be descending
they must be descending	I must have descended
you must have descended
she must have descended
we must have descended
you must have descended
they must have descended	I must have been descending
you must have been descending
she must have been descending
we must have been descending
you must have been descending
they must have been descending	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I mustn't descend
you mustn't descend
she mustn't descend
we mustn't descend
you mustn't descend
they mustn't descend 	I mustn't be descending
you mustn't be descending
she mustn't be descending
we mustn't be descending
you mustn't be descending
they mustn't be descending	I mustn't have descended
you mustn't have descended
she mustn't have descended
we mustn't have descended
you mustn't have descended
they mustn't have descended	I mustn't have been descending
you mustn't have been descending
she mustn't have been descending
we mustn't have been descending
you mustn't have been descending
they mustn't have been descending	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I descend?
must you descend?
must she descend?
must we descend?
must you descend?
must they descend? 	must I be descending?
must you be descending?
must she be descending?
must we be descending?
must you be descending?
must they be descending? 	must I have descended?
must you have descended?
must she have descended?
must we have descended?
must you have descended?
must they have descended? 	must I have been descending?
must you have been descending?
must she have been descending?
must we have been descending?
must you have been descending?
must they have been descending? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
mustn't I descend?
mustn't you descend?
mustn't she descend?
mustn't we descend?
mustn't you descend?
mustn't they descend? 	mustn't I be descending?
mustn't you be descending?
mustn't she be descending?
mustn't we be descending?
mustn't you be descending?
mustn't they be descending? 	mustn't I have descended?
mustn't you have descended?
mustn't she have descended?
mustn't we have descended?
mustn't you have descended?
mustn't they have descended? 	mustn't I have been descending?
mustn't you have been descending?
mustn't she have been descending?
mustn't we have been descending?
mustn't you have been descending?
mustn't they have been descending?