I may purify you may purify he may purify we may purify you may purify they may purify
V-ing form
I may be purifying you may be purifying he may be purifying we may be purifying you may be purifying they may be purifying
Perfect
I may have purified you may have purified he may have purified we may have purified you may have purified they may have purified
V-ing perfect
I may have been purifying you may have been purifying he may have been purifying we may have been purifying you may have been purifying they may have been purifying
Negation
Simple form
I mayn't purify you mayn't purify he mayn't purify we mayn't purify you mayn't purify they mayn't purify
V-ing form
I mayn't be purifying you mayn't be purifying he mayn't be purifying we mayn't be purifying you mayn't be purifying they mayn't be purifying
Perfect
I mayn't have purified you mayn't have purified he mayn't have purified we mayn't have purified you mayn't have purified they mayn't have purified
V-ing perfect
I mayn't have been purifying you mayn't have been purifying he mayn't have been purifying we mayn't have been purifying you mayn't have been purifying they mayn't have been purifying
Interrogative form
Simple form
may I purify? may you purify? may he purify? may we purify? may you purify? may they purify?
V-ing form
may I be purifying? may you be purifying? may he be purifying? may we be purifying? may you be purifying? may they be purifying?
Perfect
may I have purified? may you have purified? may he have purified? may we have purified? may you have purified? may they have purified?
V-ing perfect
may I have been purifying? may you have been purifying? may he have been purifying? may we have been purifying? may you have been purifying? may they have been purifying?
Interro-negative form
Simple form
mayn't I purify? mayn't you purify? mayn't he purify? mayn't we purify? mayn't you purify? mayn't they purify?
V-ing form
mayn't I be purifying? mayn't you be purifying? mayn't he be purifying? mayn't we be purifying? mayn't you be purifying? mayn't they be purifying?
Perfect
mayn't I have purified? mayn't you have purified? mayn't he have purified? mayn't we have purified? mayn't you have purified? mayn't they have purified?
V-ing perfect
mayn't I have been purifying? mayn't you have been purifying? mayn't he have been purifying? mayn't we have been purifying? mayn't you have been purifying? mayn't they have been purifying?