I may purify you may purify she may purify we may purify you may purify they may purify
V-ing form
I may be purifying you may be purifying she may be purifying we may be purifying you may be purifying they may be purifying
Perfect
I may have purified you may have purified she 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 she may have been purifying we may have been purifying you may have been purifying they may have been purifying
Negation
Simple form
I may not purify you may not purify she may not purify we may not purify you may not purify they may not purify
V-ing form
I may not be purifying you may not be purifying she may not be purifying we may not be purifying you may not be purifying they may not be purifying
Perfect
I may not have purified you may not have purified she may not have purified we may not have purified you may not have purified they may not have purified
V-ing perfect
I may not have been purifying you may not have been purifying she may not have been purifying we may not have been purifying you may not have been purifying they may not have been purifying
Interrogative form
Simple form
may I purify? may you purify? may she purify? may we purify? may you purify? may they purify?
V-ing form
may I be purifying? may you be purifying? may she be purifying? may we be purifying? may you be purifying? may they be purifying?
Perfect
may I have purified? may you have purified? may she 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 she have been purifying? may we have been purifying? may you have been purifying? may they have been purifying?
Interro-negative form
Simple form
may I not purify? may you not purify? may she not purify? may we not purify? may you not purify? may they not purify?
V-ing form
may I not be purifying? may you not be purifying? may she not be purifying? may we not be purifying? may you not be purifying? may they not be purifying?
Perfect
may I not have purified? may you not have purified? may she not have purified? may we not have purified? may you not have purified? may they not have purified?
V-ing perfect
may I not have been purifying? may you not have been purifying? may she not have been purifying? may we not have been purifying? may you not have been purifying? may they not have been purifying?