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 may not lumber you may not lumber he may not lumber we may not lumber you may not lumber they may not lumber	I may not be lumbering you may not be lumbering he may not be lumbering we may not be lumbering you may not be lumbering they may not be lumbering
Perfect	V-ing perfect
I may not have lumbered you may not have lumbered he may not have lumbered we may not have lumbered you may not have lumbered they may not have lumbered	I may not have been lumbering you may not have been lumbering he may not have been lumbering we may not have been lumbering you may not have been lumbering they may not 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
may I not lumber? may you not lumber? may he not lumber? may we not lumber? may you not lumber? may they not lumber?	may I not be lumbering? may you not be lumbering? may he not be lumbering? may we not be lumbering? may you not be lumbering? may they not be lumbering?
Perfect	V-ing perfect
may I not have lumbered? may you not have lumbered? may he not have lumbered? may we not have lumbered? may you not have lumbered? may they not have lumbered?	may I not have been lumbering? may you not have been lumbering? may he not have been lumbering? may we not have been lumbering? may you not have been lumbering? may they not have been lumbering?