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