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