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