I may dumbfound you may dumbfound she may dumbfound we may dumbfound you may dumbfound they may dumbfound
V-ing form
I may be dumbfounding you may be dumbfounding she may be dumbfounding we may be dumbfounding you may be dumbfounding they may be dumbfounding
Perfect
I may have dumbfounded you may have dumbfounded she may have dumbfounded we may have dumbfounded you may have dumbfounded they may have dumbfounded
V-ing perfect
I may have been dumbfounding you may have been dumbfounding she may have been dumbfounding we may have been dumbfounding you may have been dumbfounding they may have been dumbfounding
Negation
Simple form
I mayn't dumbfound you mayn't dumbfound she mayn't dumbfound we mayn't dumbfound you mayn't dumbfound they mayn't dumbfound
V-ing form
I mayn't be dumbfounding you mayn't be dumbfounding she mayn't be dumbfounding we mayn't be dumbfounding you mayn't be dumbfounding they mayn't be dumbfounding
Perfect
I mayn't have dumbfounded you mayn't have dumbfounded she mayn't have dumbfounded we mayn't have dumbfounded you mayn't have dumbfounded they mayn't have dumbfounded
V-ing perfect
I mayn't have been dumbfounding you mayn't have been dumbfounding she mayn't have been dumbfounding we mayn't have been dumbfounding you mayn't have been dumbfounding they mayn't have been dumbfounding
Interrogative form
Simple form
may I dumbfound? may you dumbfound? may she dumbfound? may we dumbfound? may you dumbfound? may they dumbfound?
V-ing form
may I be dumbfounding? may you be dumbfounding? may she be dumbfounding? may we be dumbfounding? may you be dumbfounding? may they be dumbfounding?
Perfect
may I have dumbfounded? may you have dumbfounded? may she have dumbfounded? may we have dumbfounded? may you have dumbfounded? may they have dumbfounded?
V-ing perfect
may I have been dumbfounding? may you have been dumbfounding? may she have been dumbfounding? may we have been dumbfounding? may you have been dumbfounding? may they have been dumbfounding?
Interro-negative form
Simple form
mayn't I dumbfound? mayn't you dumbfound? mayn't she dumbfound? mayn't we dumbfound? mayn't you dumbfound? mayn't they dumbfound?
V-ing form
mayn't I be dumbfounding? mayn't you be dumbfounding? mayn't she be dumbfounding? mayn't we be dumbfounding? mayn't you be dumbfounding? mayn't they be dumbfounding?
Perfect
mayn't I have dumbfounded? mayn't you have dumbfounded? mayn't she have dumbfounded? mayn't we have dumbfounded? mayn't you have dumbfounded? mayn't they have dumbfounded?
V-ing perfect
mayn't I have been dumbfounding? mayn't you have been dumbfounding? mayn't she have been dumbfounding? mayn't we have been dumbfounding? mayn't you have been dumbfounding? mayn't they have been dumbfounding?