I may chain-smoke you may chain-smoke she may chain-smoke we may chain-smoke you may chain-smoke they may chain-smoke
V-ing form
I may be chain-smoking you may be chain-smoking she may be chain-smoking we may be chain-smoking you may be chain-smoking they may be chain-smoking
Perfect
I may have chain-smoked you may have chain-smoked she may have chain-smoked we may have chain-smoked you may have chain-smoked they may have chain-smoked
V-ing perfect
I may have been chain-smoking you may have been chain-smoking she may have been chain-smoking we may have been chain-smoking you may have been chain-smoking they may have been chain-smoking
Negation
Simple form
I mayn't chain-smoke you mayn't chain-smoke she mayn't chain-smoke we mayn't chain-smoke you mayn't chain-smoke they mayn't chain-smoke
V-ing form
I mayn't be chain-smoking you mayn't be chain-smoking she mayn't be chain-smoking we mayn't be chain-smoking you mayn't be chain-smoking they mayn't be chain-smoking
Perfect
I mayn't have chain-smoked you mayn't have chain-smoked she mayn't have chain-smoked we mayn't have chain-smoked you mayn't have chain-smoked they mayn't have chain-smoked
V-ing perfect
I mayn't have been chain-smoking you mayn't have been chain-smoking she mayn't have been chain-smoking we mayn't have been chain-smoking you mayn't have been chain-smoking they mayn't have been chain-smoking
Interrogative form
Simple form
may I chain-smoke? may you chain-smoke? may she chain-smoke? may we chain-smoke? may you chain-smoke? may they chain-smoke?
V-ing form
may I be chain-smoking? may you be chain-smoking? may she be chain-smoking? may we be chain-smoking? may you be chain-smoking? may they be chain-smoking?
Perfect
may I have chain-smoked? may you have chain-smoked? may she have chain-smoked? may we have chain-smoked? may you have chain-smoked? may they have chain-smoked?
V-ing perfect
may I have been chain-smoking? may you have been chain-smoking? may she have been chain-smoking? may we have been chain-smoking? may you have been chain-smoking? may they have been chain-smoking?
Interro-negative form
Simple form
mayn't I chain-smoke? mayn't you chain-smoke? mayn't she chain-smoke? mayn't we chain-smoke? mayn't you chain-smoke? mayn't they chain-smoke?
V-ing form
mayn't I be chain-smoking? mayn't you be chain-smoking? mayn't she be chain-smoking? mayn't we be chain-smoking? mayn't you be chain-smoking? mayn't they be chain-smoking?
Perfect
mayn't I have chain-smoked? mayn't you have chain-smoked? mayn't she have chain-smoked? mayn't we have chain-smoked? mayn't you have chain-smoked? mayn't they have chain-smoked?
V-ing perfect
mayn't I have been chain-smoking? mayn't you have been chain-smoking? mayn't she have been chain-smoking? mayn't we have been chain-smoking? mayn't you have been chain-smoking? mayn't they have been chain-smoking?