English verb conjugation
MAY LUMBER

Regular verb: lumber - lumbered - lumbered

Affirmation

Simple form	V-ing form
I may lumber you may lumber he may lumber we may lumber you may lumber they may lumber	I may be lumbering you may be lumbering he may be lumbering we may be lumbering you may be lumbering they may be lumbering
Perfect	V-ing perfect
I may have lumbered you may have lumbered he may have lumbered we may have lumbered you may have lumbered they may have lumbered	I may have been lumbering you may have been lumbering he may have been lumbering we may have been lumbering you may have been lumbering they may have been lumbering

Negation

Simple form	V-ing form
I mayn't lumber you mayn't lumber he mayn't lumber we mayn't lumber you mayn't lumber they mayn't lumber	I mayn't be lumbering you mayn't be lumbering he mayn't be lumbering we mayn't be lumbering you mayn't be lumbering they mayn't be lumbering
Perfect	V-ing perfect
I mayn't have lumbered you mayn't have lumbered he mayn't have lumbered we mayn't have lumbered you mayn't have lumbered they mayn't have lumbered	I mayn't have been lumbering you mayn't have been lumbering he mayn't have been lumbering we mayn't have been lumbering you mayn't have been lumbering they mayn't have been lumbering

Interrogative form

Simple form	V-ing form
may I lumber? may you lumber? may he lumber? may we lumber? may you lumber? may they lumber?	may I be lumbering? may you be lumbering? may he be lumbering? may we be lumbering? may you be lumbering? may they be lumbering?
Perfect	V-ing perfect
may I have lumbered? may you have lumbered? may he have lumbered? may we have lumbered? may you have lumbered? may they have lumbered?	may I have been lumbering? may you have been lumbering? may he have been lumbering? may we have been lumbering? may you have been lumbering? may they have been lumbering?

Interro-negative form

Simple form	V-ing form
mayn't I lumber? mayn't you lumber? mayn't he lumber? mayn't we lumber? mayn't you lumber? mayn't they lumber?	mayn't I be lumbering? mayn't you be lumbering? mayn't he be lumbering? mayn't we be lumbering? mayn't you be lumbering? mayn't they be lumbering?
Perfect	V-ing perfect
mayn't I have lumbered? mayn't you have lumbered? mayn't he have lumbered? mayn't we have lumbered? mayn't you have lumbered? mayn't they have lumbered?	mayn't I have been lumbering? mayn't you have been lumbering? mayn't he have been lumbering? mayn't we have been lumbering? mayn't you have been lumbering? mayn't they have been lumbering?