I may duck you may duck he may duck we may duck you may duck they may duck
V-ing form
I may be ducking you may be ducking he may be ducking we may be ducking you may be ducking they may be ducking
Perfect
I may have ducked you may have ducked he may have ducked we may have ducked you may have ducked they may have ducked
V-ing perfect
I may have been ducking you may have been ducking he may have been ducking we may have been ducking you may have been ducking they may have been ducking
Negation
Simple form
I may not duck you may not duck he may not duck we may not duck you may not duck they may not duck
V-ing form
I may not be ducking you may not be ducking he may not be ducking we may not be ducking you may not be ducking they may not be ducking
Perfect
I may not have ducked you may not have ducked he may not have ducked we may not have ducked you may not have ducked they may not have ducked
V-ing perfect
I may not have been ducking you may not have been ducking he may not have been ducking we may not have been ducking you may not have been ducking they may not have been ducking
Interrogative form
Simple form
may I duck? may you duck? may he duck? may we duck? may you duck? may they duck?
V-ing form
may I be ducking? may you be ducking? may he be ducking? may we be ducking? may you be ducking? may they be ducking?
Perfect
may I have ducked? may you have ducked? may he have ducked? may we have ducked? may you have ducked? may they have ducked?
V-ing perfect
may I have been ducking? may you have been ducking? may he have been ducking? may we have been ducking? may you have been ducking? may they have been ducking?
Interro-negative form
Simple form
may I not duck? may you not duck? may he not duck? may we not duck? may you not duck? may they not duck?
V-ing form
may I not be ducking? may you not be ducking? may he not be ducking? may we not be ducking? may you not be ducking? may they not be ducking?
Perfect
may I not have ducked? may you not have ducked? may he not have ducked? may we not have ducked? may you not have ducked? may they not have ducked?
V-ing perfect
may I not have been ducking? may you not have been ducking? may he not have been ducking? may we not have been ducking? may you not have been ducking? may they not have been ducking?