I may seine you may seine he may seine we may seine you may seine they may seine
V-ing form
I may be seining you may be seining he may be seining we may be seining you may be seining they may be seining
Perfect
I may have seined you may have seined he may have seined we may have seined you may have seined they may have seined
V-ing perfect
I may have been seining you may have been seining he may have been seining we may have been seining you may have been seining they may have been seining
Negation
Simple form
I may not seine you may not seine he may not seine we may not seine you may not seine they may not seine
V-ing form
I may not be seining you may not be seining he may not be seining we may not be seining you may not be seining they may not be seining
Perfect
I may not have seined you may not have seined he may not have seined we may not have seined you may not have seined they may not have seined
V-ing perfect
I may not have been seining you may not have been seining he may not have been seining we may not have been seining you may not have been seining they may not have been seining
Interrogative form
Simple form
may I seine? may you seine? may he seine? may we seine? may you seine? may they seine?
V-ing form
may I be seining? may you be seining? may he be seining? may we be seining? may you be seining? may they be seining?
Perfect
may I have seined? may you have seined? may he have seined? may we have seined? may you have seined? may they have seined?
V-ing perfect
may I have been seining? may you have been seining? may he have been seining? may we have been seining? may you have been seining? may they have been seining?
Interro-negative form
Simple form
may I not seine? may you not seine? may he not seine? may we not seine? may you not seine? may they not seine?
V-ing form
may I not be seining? may you not be seining? may he not be seining? may we not be seining? may you not be seining? may they not be seining?
Perfect
may I not have seined? may you not have seined? may he not have seined? may we not have seined? may you not have seined? may they not have seined?
V-ing perfect
may I not have been seining? may you not have been seining? may he not have been seining? may we not have been seining? may you not have been seining? may they not have been seining?