could flummox
Regular verb: flummox - flummoxed- flummoxed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could flummox
you could flummox
she could flummox
we could flummox
you could flummox
they could flummox 	I could be flummoxing
you could be flummoxing
she could be flummoxing
we could be flummoxing
you could be flummoxing
they could be flummoxing	I could have flummoxed
you could have flummoxed
she could have flummoxed
we could have flummoxed
you could have flummoxed
they could have flummoxed	I could have been flummoxing
you could have been flummoxing
she could have been flummoxing
we could have been flummoxing
you could have been flummoxing
they could have been flummoxing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't flummox
you couldn't flummox
she couldn't flummox
we couldn't flummox
you couldn't flummox
they couldn't flummox 	I couldn't be flummoxing
you couldn't be flummoxing
she couldn't be flummoxing
we couldn't be flummoxing
you couldn't be flummoxing
they couldn't be flummoxing	I couldn't have flummoxed
you couldn't have flummoxed
she couldn't have flummoxed
we couldn't have flummoxed
you couldn't have flummoxed
they couldn't have flummoxed	I couldn't have been flummoxing
you couldn't have been flummoxing
she couldn't have been flummoxing
we couldn't have been flummoxing
you couldn't have been flummoxing
they couldn't have been flummoxing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I flummox?
could you flummox?
could she flummox?
could we flummox?
could you flummox?
could they flummox? 	could I be flummoxing?
could you be flummoxing?
could she be flummoxing?
could we be flummoxing?
could you be flummoxing?
could they be flummoxing? 	could I have flummoxed?
could you have flummoxed?
could she have flummoxed?
could we have flummoxed?
could you have flummoxed?
could they have flummoxed? 	could I have been flummoxing?
could you have been flummoxing?
could she have been flummoxing?
could we have been flummoxing?
could you have been flummoxing?
could they have been flummoxing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I flummox?
couldn't you flummox?
couldn't she flummox?
couldn't we flummox?
couldn't you flummox?
couldn't they flummox? 	couldn't I be flummoxing?
couldn't you be flummoxing?
couldn't she be flummoxing?
couldn't we be flummoxing?
couldn't you be flummoxing?
couldn't they be flummoxing? 	couldn't I have flummoxed?
couldn't you have flummoxed?
couldn't she have flummoxed?
couldn't we have flummoxed?
couldn't you have flummoxed?
couldn't they have flummoxed? 	couldn't I have been flummoxing?
couldn't you have been flummoxing?
couldn't she have been flummoxing?
couldn't we have been flummoxing?
couldn't you have been flummoxing?
couldn't they have been flummoxing?