I may drain you may drain she may drain we may drain you may drain they may drain
V-ing form
I may be draining you may be draining she may be draining we may be draining you may be draining they may be draining
Perfect
I may have drained you may have drained she may have drained we may have drained you may have drained they may have drained
V-ing perfect
I may have been draining you may have been draining she may have been draining we may have been draining you may have been draining they may have been draining
Negation
Simple form
I may not drain you may not drain she may not drain we may not drain you may not drain they may not drain
V-ing form
I may not be draining you may not be draining she may not be draining we may not be draining you may not be draining they may not be draining
Perfect
I may not have drained you may not have drained she may not have drained we may not have drained you may not have drained they may not have drained
V-ing perfect
I may not have been draining you may not have been draining she may not have been draining we may not have been draining you may not have been draining they may not have been draining
Interrogative form
Simple form
may I drain? may you drain? may she drain? may we drain? may you drain? may they drain?
V-ing form
may I be draining? may you be draining? may she be draining? may we be draining? may you be draining? may they be draining?
Perfect
may I have drained? may you have drained? may she have drained? may we have drained? may you have drained? may they have drained?
V-ing perfect
may I have been draining? may you have been draining? may she have been draining? may we have been draining? may you have been draining? may they have been draining?
Interro-negative form
Simple form
may I not drain? may you not drain? may she not drain? may we not drain? may you not drain? may they not drain?
V-ing form
may I not be draining? may you not be draining? may she not be draining? may we not be draining? may you not be draining? may they not be draining?
Perfect
may I not have drained? may you not have drained? may she not have drained? may we not have drained? may you not have drained? may they not have drained?
V-ing perfect
may I not have been draining? may you not have been draining? may she not have been draining? may we not have been draining? may you not have been draining? may they not have been draining?