English verb conjugation
COULD FLABBERGAST

Regular verb: flabbergast - flabbergasted - flabbergasted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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