I may thank you may thank he may thank we may thank you may thank they may thank
V-ing form
I may be thanking you may be thanking he may be thanking we may be thanking you may be thanking they may be thanking
Perfect
I may have thanked you may have thanked he may have thanked we may have thanked you may have thanked they may have thanked
V-ing perfect
I may have been thanking you may have been thanking he may have been thanking we may have been thanking you may have been thanking they may have been thanking
Negation
Simple form
I mayn't thank you mayn't thank he mayn't thank we mayn't thank you mayn't thank they mayn't thank
V-ing form
I mayn't be thanking you mayn't be thanking he mayn't be thanking we mayn't be thanking you mayn't be thanking they mayn't be thanking
Perfect
I mayn't have thanked you mayn't have thanked he mayn't have thanked we mayn't have thanked you mayn't have thanked they mayn't have thanked
V-ing perfect
I mayn't have been thanking you mayn't have been thanking he mayn't have been thanking we mayn't have been thanking you mayn't have been thanking they mayn't have been thanking
Interrogative form
Simple form
may I thank? may you thank? may he thank? may we thank? may you thank? may they thank?
V-ing form
may I be thanking? may you be thanking? may he be thanking? may we be thanking? may you be thanking? may they be thanking?
Perfect
may I have thanked? may you have thanked? may he have thanked? may we have thanked? may you have thanked? may they have thanked?
V-ing perfect
may I have been thanking? may you have been thanking? may he have been thanking? may we have been thanking? may you have been thanking? may they have been thanking?
Interro-negative form
Simple form
mayn't I thank? mayn't you thank? mayn't he thank? mayn't we thank? mayn't you thank? mayn't they thank?
V-ing form
mayn't I be thanking? mayn't you be thanking? mayn't he be thanking? mayn't we be thanking? mayn't you be thanking? mayn't they be thanking?
Perfect
mayn't I have thanked? mayn't you have thanked? mayn't he have thanked? mayn't we have thanked? mayn't you have thanked? mayn't they have thanked?
V-ing perfect
mayn't I have been thanking? mayn't you have been thanking? mayn't he have been thanking? mayn't we have been thanking? mayn't you have been thanking? mayn't they have been thanking?