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