
Regular verb: boil - boiled - boiled
Simple form | V-ing form | 
| I may boil you may boil she may boil we may boil you may boil they may boil  | I may be boiling you may be boiling she may be boiling we may be boiling you may be boiling they may be boiling  | 
Perfect | V-ing perfect | 
| I may have boiled you may have boiled she may have boiled we may have boiled you may have boiled they may have boiled  | I may have been boiling you may have been boiling she may have been boiling we may have been boiling you may have been boiling they may have been boiling  | 
Simple form | V-ing form | 
| I mayn't boil you mayn't boil she mayn't boil we mayn't boil you mayn't boil they mayn't boil  | I mayn't be boiling you mayn't be boiling she mayn't be boiling we mayn't be boiling you mayn't be boiling they mayn't be boiling  | 
Perfect | V-ing perfect | 
| I mayn't have boiled you mayn't have boiled she mayn't have boiled we mayn't have boiled you mayn't have boiled they mayn't have boiled  | I mayn't have been boiling you mayn't have been boiling she mayn't have been boiling we mayn't have been boiling you mayn't have been boiling they mayn't have been boiling  | 
Simple form | V-ing form | 
| may I boil? may you boil? may she boil? may we boil? may you boil? may they boil?  | may I be boiling? may you be boiling? may she be boiling? may we be boiling? may you be boiling? may they be boiling?  | 
Perfect | V-ing perfect | 
| may I have boiled? may you have boiled? may she have boiled? may we have boiled? may you have boiled? may they have boiled?  | may I have been boiling? may you have been boiling? may she have been boiling? may we have been boiling? may you have been boiling? may they have been boiling?  | 
Simple form | V-ing form | 
| mayn't I boil? mayn't you boil? mayn't she boil? mayn't we boil? mayn't you boil? mayn't they boil?  | mayn't I be boiling? mayn't you be boiling? mayn't she be boiling? mayn't we be boiling? mayn't you be boiling? mayn't they be boiling?  | 
Perfect | V-ing perfect | 
| mayn't I have boiled? mayn't you have boiled? mayn't she have boiled? mayn't we have boiled? mayn't you have boiled? mayn't they have boiled?  | mayn't I have been boiling? mayn't you have been boiling? mayn't she have been boiling? mayn't we have been boiling? mayn't you have been boiling? mayn't they have been boiling?  |