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