I may perceive you may perceive she may perceive we may perceive you may perceive they may perceive
V-ing form
I may be perceiving you may be perceiving she may be perceiving we may be perceiving you may be perceiving they may be perceiving
Perfect
I may have perceived you may have perceived she may have perceived we may have perceived you may have perceived they may have perceived
V-ing perfect
I may have been perceiving you may have been perceiving she may have been perceiving we may have been perceiving you may have been perceiving they may have been perceiving
Negation
Simple form
I may not perceive you may not perceive she may not perceive we may not perceive you may not perceive they may not perceive
V-ing form
I may not be perceiving you may not be perceiving she may not be perceiving we may not be perceiving you may not be perceiving they may not be perceiving
Perfect
I may not have perceived you may not have perceived she may not have perceived we may not have perceived you may not have perceived they may not have perceived
V-ing perfect
I may not have been perceiving you may not have been perceiving she may not have been perceiving we may not have been perceiving you may not have been perceiving they may not have been perceiving
Interrogative form
Simple form
may I perceive? may you perceive? may she perceive? may we perceive? may you perceive? may they perceive?
V-ing form
may I be perceiving? may you be perceiving? may she be perceiving? may we be perceiving? may you be perceiving? may they be perceiving?
Perfect
may I have perceived? may you have perceived? may she have perceived? may we have perceived? may you have perceived? may they have perceived?
V-ing perfect
may I have been perceiving? may you have been perceiving? may she have been perceiving? may we have been perceiving? may you have been perceiving? may they have been perceiving?
Interro-negative form
Simple form
may I not perceive? may you not perceive? may she not perceive? may we not perceive? may you not perceive? may they not perceive?
V-ing form
may I not be perceiving? may you not be perceiving? may she not be perceiving? may we not be perceiving? may you not be perceiving? may they not be perceiving?
Perfect
may I not have perceived? may you not have perceived? may she not have perceived? may we not have perceived? may you not have perceived? may they not have perceived?
V-ing perfect
may I not have been perceiving? may you not have been perceiving? may she not have been perceiving? may we not have been perceiving? may you not have been perceiving? may they not have been perceiving?