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 mayn't perceive you mayn't perceive she mayn't perceive we mayn't perceive you mayn't perceive they mayn't perceive
V-ing form
I mayn't be perceiving you mayn't be perceiving she mayn't be perceiving we mayn't be perceiving you mayn't be perceiving they mayn't be perceiving
Perfect
I mayn't have perceived you mayn't have perceived she mayn't have perceived we mayn't have perceived you mayn't have perceived they mayn't have perceived
V-ing perfect
I mayn't have been perceiving you mayn't have been perceiving she mayn't have been perceiving we mayn't have been perceiving you mayn't have been perceiving they mayn't 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
mayn't I perceive? mayn't you perceive? mayn't she perceive? mayn't we perceive? mayn't you perceive? mayn't they perceive?
V-ing form
mayn't I be perceiving? mayn't you be perceiving? mayn't she be perceiving? mayn't we be perceiving? mayn't you be perceiving? mayn't they be perceiving?
Perfect
mayn't I have perceived? mayn't you have perceived? mayn't she have perceived? mayn't we have perceived? mayn't you have perceived? mayn't they have perceived?
V-ing perfect
mayn't I have been perceiving? mayn't you have been perceiving? mayn't she have been perceiving? mayn't we have been perceiving? mayn't you have been perceiving? mayn't they have been perceiving?