English verb conjugation
CAN DUMBFOUND

Regular verb: dumbfound - dumbfounded - dumbfounded

Affirmation

Simple form	V-ing form
I can dumbfound you can dumbfound he can dumbfound we can dumbfound you can dumbfound they can dumbfound	I can be dumbfounding you can be dumbfounding he can be dumbfounding we can be dumbfounding you can be dumbfounding they can be dumbfounding
Perfect	V-ing perfect
I can have dumbfounded you can have dumbfounded he can have dumbfounded we can have dumbfounded you can have dumbfounded they can have dumbfounded	I can have been dumbfounding you can have been dumbfounding he can have been dumbfounding we can have been dumbfounding you can have been dumbfounding they can have been dumbfounding

Negation

Simple form	V-ing form
I can't dumbfound you can't dumbfound he can't dumbfound we can't dumbfound you can't dumbfound they can't dumbfound	I can't be dumbfounding you can't be dumbfounding he can't be dumbfounding we can't be dumbfounding you can't be dumbfounding they can't be dumbfounding
Perfect	V-ing perfect
I can't have dumbfounded you can't have dumbfounded he can't have dumbfounded we can't have dumbfounded you can't have dumbfounded they can't have dumbfounded	I can't have been dumbfounding you can't have been dumbfounding he can't have been dumbfounding we can't have been dumbfounding you can't have been dumbfounding they can't have been dumbfounding

Interrogative form

Simple form	V-ing form
can I dumbfound? can you dumbfound? can he dumbfound? can we dumbfound? can you dumbfound? can they dumbfound?	can I be dumbfounding? can you be dumbfounding? can he be dumbfounding? can we be dumbfounding? can you be dumbfounding? can they be dumbfounding?
Perfect	V-ing perfect
can I have dumbfounded? can you have dumbfounded? can he have dumbfounded? can we have dumbfounded? can you have dumbfounded? can they have dumbfounded?	can I have been dumbfounding? can you have been dumbfounding? can he have been dumbfounding? can we have been dumbfounding? can you have been dumbfounding? can they have been dumbfounding?

Interro-negative form

Simple form	V-ing form
can't I dumbfound? can't you dumbfound? can't he dumbfound? can't we dumbfound? can't you dumbfound? can't they dumbfound?	can't I be dumbfounding? can't you be dumbfounding? can't he be dumbfounding? can't we be dumbfounding? can't you be dumbfounding? can't they be dumbfounding?
Perfect	V-ing perfect
can't I have dumbfounded? can't you have dumbfounded? can't he have dumbfounded? can't we have dumbfounded? can't you have dumbfounded? can't they have dumbfounded?	can't I have been dumbfounding? can't you have been dumbfounding? can't he have been dumbfounding? can't we have been dumbfounding? can't you have been dumbfounding? can't they have been dumbfounding?