could flabbergast
Regular verb: flabbergast - flabbergasted- flabbergasted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I couldn't flabbergast
you couldn't flabbergast
he couldn't flabbergast
we couldn't flabbergast
you couldn't flabbergast
they couldn't flabbergast 	I couldn't be flabbergasting
you couldn't be flabbergasting
he couldn't be flabbergasting
we couldn't be flabbergasting
you couldn't be flabbergasting
they couldn't be flabbergasting	I couldn't have flabbergasted
you couldn't have flabbergasted
he couldn't have flabbergasted
we couldn't have flabbergasted
you couldn't have flabbergasted
they couldn't have flabbergasted	I couldn't have been flabbergasting
you couldn't have been flabbergasting
he couldn't have been flabbergasting
we couldn't have been flabbergasting
you couldn't have been flabbergasting
they couldn't have been flabbergasting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
couldn't I flabbergast?
couldn't you flabbergast?
couldn't he flabbergast?
couldn't we flabbergast?
couldn't you flabbergast?
couldn't they flabbergast? 	couldn't I be flabbergasting?
couldn't you be flabbergasting?
couldn't he be flabbergasting?
couldn't we be flabbergasting?
couldn't you be flabbergasting?
couldn't they be flabbergasting? 	couldn't I have flabbergasted?
couldn't you have flabbergasted?
couldn't he have flabbergasted?
couldn't we have flabbergasted?
couldn't you have flabbergasted?
couldn't they have flabbergasted? 	couldn't I have been flabbergasting?
couldn't you have been flabbergasting?
couldn't he have been flabbergasting?
couldn't we have been flabbergasting?
couldn't you have been flabbergasting?
couldn't they have been flabbergasting?