English verb conjugation
MUST CORRESPOND

Regular verb: correspond - corresponded - corresponded

Affirmation

Simple form	V-ing form
I must correspond you must correspond he must correspond we must correspond you must correspond they must correspond	I must be corresponding you must be corresponding he must be corresponding we must be corresponding you must be corresponding they must be corresponding
Perfect	V-ing perfect
I must have corresponded you must have corresponded he must have corresponded we must have corresponded you must have corresponded they must have corresponded	I must have been corresponding you must have been corresponding he must have been corresponding we must have been corresponding you must have been corresponding they must have been corresponding

Negation

Simple form	V-ing form
I mustn't correspond you mustn't correspond he mustn't correspond we mustn't correspond you mustn't correspond they mustn't correspond	I mustn't be corresponding you mustn't be corresponding he mustn't be corresponding we mustn't be corresponding you mustn't be corresponding they mustn't be corresponding
Perfect	V-ing perfect
I mustn't have corresponded you mustn't have corresponded he mustn't have corresponded we mustn't have corresponded you mustn't have corresponded they mustn't have corresponded	I mustn't have been corresponding you mustn't have been corresponding he mustn't have been corresponding we mustn't have been corresponding you mustn't have been corresponding they mustn't have been corresponding

Interrogative form

Simple form	V-ing form
must I correspond? must you correspond? must he correspond? must we correspond? must you correspond? must they correspond?	must I be corresponding? must you be corresponding? must he be corresponding? must we be corresponding? must you be corresponding? must they be corresponding?
Perfect	V-ing perfect
must I have corresponded? must you have corresponded? must he have corresponded? must we have corresponded? must you have corresponded? must they have corresponded?	must I have been corresponding? must you have been corresponding? must he have been corresponding? must we have been corresponding? must you have been corresponding? must they have been corresponding?

Interro-negative form

Simple form	V-ing form
mustn't I correspond? mustn't you correspond? mustn't he correspond? mustn't we correspond? mustn't you correspond? mustn't they correspond?	mustn't I be corresponding? mustn't you be corresponding? mustn't he be corresponding? mustn't we be corresponding? mustn't you be corresponding? mustn't they be corresponding?
Perfect	V-ing perfect
mustn't I have corresponded? mustn't you have corresponded? mustn't he have corresponded? mustn't we have corresponded? mustn't you have corresponded? mustn't they have corresponded?	mustn't I have been corresponding? mustn't you have been corresponding? mustn't he have been corresponding? mustn't we have been corresponding? mustn't you have been corresponding? mustn't they have been corresponding?