I may thread you may thread she may thread we may thread you may thread they may thread
V-ing form
I may be threading you may be threading she may be threading we may be threading you may be threading they may be threading
Perfect
I may have threaded you may have threaded she may have threaded we may have threaded you may have threaded they may have threaded
V-ing perfect
I may have been threading you may have been threading she may have been threading we may have been threading you may have been threading they may have been threading
Negation
Simple form
I may not thread you may not thread she may not thread we may not thread you may not thread they may not thread
V-ing form
I may not be threading you may not be threading she may not be threading we may not be threading you may not be threading they may not be threading
Perfect
I may not have threaded you may not have threaded she may not have threaded we may not have threaded you may not have threaded they may not have threaded
V-ing perfect
I may not have been threading you may not have been threading she may not have been threading we may not have been threading you may not have been threading they may not have been threading
Interrogative form
Simple form
may I thread? may you thread? may she thread? may we thread? may you thread? may they thread?
V-ing form
may I be threading? may you be threading? may she be threading? may we be threading? may you be threading? may they be threading?
Perfect
may I have threaded? may you have threaded? may she have threaded? may we have threaded? may you have threaded? may they have threaded?
V-ing perfect
may I have been threading? may you have been threading? may she have been threading? may we have been threading? may you have been threading? may they have been threading?
Interro-negative form
Simple form
may I not thread? may you not thread? may she not thread? may we not thread? may you not thread? may they not thread?
V-ing form
may I not be threading? may you not be threading? may she not be threading? may we not be threading? may you not be threading? may they not be threading?
Perfect
may I not have threaded? may you not have threaded? may she not have threaded? may we not have threaded? may you not have threaded? may they not have threaded?
V-ing perfect
may I not have been threading? may you not have been threading? may she not have been threading? may we not have been threading? may you not have been threading? may they not have been threading?