English verb conjugation
MAY ROOF

Regular verb: roof - roofed - roofed

Affirmation

Simple form	V-ing form
I may roof you may roof he may roof we may roof you may roof they may roof	I may be roofing you may be roofing he may be roofing we may be roofing you may be roofing they may be roofing
Perfect	V-ing perfect
I may have roofed you may have roofed he may have roofed we may have roofed you may have roofed they may have roofed	I may have been roofing you may have been roofing he may have been roofing we may have been roofing you may have been roofing they may have been roofing

Negation

Simple form	V-ing form
I mayn't roof you mayn't roof he mayn't roof we mayn't roof you mayn't roof they mayn't roof	I mayn't be roofing you mayn't be roofing he mayn't be roofing we mayn't be roofing you mayn't be roofing they mayn't be roofing
Perfect	V-ing perfect
I mayn't have roofed you mayn't have roofed he mayn't have roofed we mayn't have roofed you mayn't have roofed they mayn't have roofed	I mayn't have been roofing you mayn't have been roofing he mayn't have been roofing we mayn't have been roofing you mayn't have been roofing they mayn't have been roofing

Interrogative form

Simple form	V-ing form
may I roof? may you roof? may he roof? may we roof? may you roof? may they roof?	may I be roofing? may you be roofing? may he be roofing? may we be roofing? may you be roofing? may they be roofing?
Perfect	V-ing perfect
may I have roofed? may you have roofed? may he have roofed? may we have roofed? may you have roofed? may they have roofed?	may I have been roofing? may you have been roofing? may he have been roofing? may we have been roofing? may you have been roofing? may they have been roofing?

Interro-negative form

Simple form	V-ing form
mayn't I roof? mayn't you roof? mayn't he roof? mayn't we roof? mayn't you roof? mayn't they roof?	mayn't I be roofing? mayn't you be roofing? mayn't he be roofing? mayn't we be roofing? mayn't you be roofing? mayn't they be roofing?
Perfect	V-ing perfect
mayn't I have roofed? mayn't you have roofed? mayn't he have roofed? mayn't we have roofed? mayn't you have roofed? mayn't they have roofed?	mayn't I have been roofing? mayn't you have been roofing? mayn't he have been roofing? mayn't we have been roofing? mayn't you have been roofing? mayn't they have been roofing?