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