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