English verb conjugation
MUST FLABBERGAST

Regular verb: flabbergast - flabbergasted - flabbergasted

Affirmation

Simple form	V-ing form
I must flabbergast you must flabbergast he must flabbergast we must flabbergast you must flabbergast they must flabbergast	I must be flabbergasting you must be flabbergasting he must be flabbergasting we must be flabbergasting you must be flabbergasting they must be flabbergasting
Perfect	V-ing perfect
I must have flabbergasted you must have flabbergasted he must have flabbergasted we must have flabbergasted you must have flabbergasted they must have flabbergasted	I must have been flabbergasting you must have been flabbergasting he must have been flabbergasting we must have been flabbergasting you must have been flabbergasting they must have been flabbergasting

Negation

Simple form	V-ing form
I must not flabbergast you must not flabbergast he must not flabbergast we must not flabbergast you must not flabbergast they must not flabbergast	I must not be flabbergasting you must not be flabbergasting he must not be flabbergasting we must not be flabbergasting you must not be flabbergasting they must not be flabbergasting
Perfect	V-ing perfect
I must not have flabbergasted you must not have flabbergasted he must not have flabbergasted we must not have flabbergasted you must not have flabbergasted they must not have flabbergasted	I must not have been flabbergasting you must not have been flabbergasting he must not have been flabbergasting we must not have been flabbergasting you must not have been flabbergasting they must not have been flabbergasting

Interrogative form

Simple form	V-ing form
must I flabbergast? must you flabbergast? must he flabbergast? must we flabbergast? must you flabbergast? must they flabbergast?	must I be flabbergasting? must you be flabbergasting? must he be flabbergasting? must we be flabbergasting? must you be flabbergasting? must they be flabbergasting?
Perfect	V-ing perfect
must I have flabbergasted? must you have flabbergasted? must he have flabbergasted? must we have flabbergasted? must you have flabbergasted? must they have flabbergasted?	must I have been flabbergasting? must you have been flabbergasting? must he have been flabbergasting? must we have been flabbergasting? must you have been flabbergasting? must they have been flabbergasting?

Interro-negative form

Simple form	V-ing form
must I not flabbergast? must you not flabbergast? must he not flabbergast? must we not flabbergast? must you not flabbergast? must they not flabbergast?	must I not be flabbergasting? must you not be flabbergasting? must he not be flabbergasting? must we not be flabbergasting? must you not be flabbergasting? must they not be flabbergasting?
Perfect	V-ing perfect
must I not have flabbergasted? must you not have flabbergasted? must he not have flabbergasted? must we not have flabbergasted? must you not have flabbergasted? must they not have flabbergasted?	must I not have been flabbergasting? must you not have been flabbergasting? must he not have been flabbergasting? must we not have been flabbergasting? must you not have been flabbergasting? must they not have been flabbergasting?