I may concertise you may concertise she may concertise we may concertise you may concertise they may concertise
V-ing form
I may be concertising you may be concertising she may be concertising we may be concertising you may be concertising they may be concertising
Perfect
I may have concertised you may have concertised she may have concertised we may have concertised you may have concertised they may have concertised
V-ing perfect
I may have been concertising you may have been concertising she may have been concertising we may have been concertising you may have been concertising they may have been concertising
Negation
Simple form
I may not concertise you may not concertise she may not concertise we may not concertise you may not concertise they may not concertise
V-ing form
I may not be concertising you may not be concertising she may not be concertising we may not be concertising you may not be concertising they may not be concertising
Perfect
I may not have concertised you may not have concertised she may not have concertised we may not have concertised you may not have concertised they may not have concertised
V-ing perfect
I may not have been concertising you may not have been concertising she may not have been concertising we may not have been concertising you may not have been concertising they may not have been concertising
Interrogative form
Simple form
may I concertise? may you concertise? may she concertise? may we concertise? may you concertise? may they concertise?
V-ing form
may I be concertising? may you be concertising? may she be concertising? may we be concertising? may you be concertising? may they be concertising?
Perfect
may I have concertised? may you have concertised? may she have concertised? may we have concertised? may you have concertised? may they have concertised?
V-ing perfect
may I have been concertising? may you have been concertising? may she have been concertising? may we have been concertising? may you have been concertising? may they have been concertising?
Interro-negative form
Simple form
may I not concertise? may you not concertise? may she not concertise? may we not concertise? may you not concertise? may they not concertise?
V-ing form
may I not be concertising? may you not be concertising? may she not be concertising? may we not be concertising? may you not be concertising? may they not be concertising?
Perfect
may I not have concertised? may you not have concertised? may she not have concertised? may we not have concertised? may you not have concertised? may they not have concertised?
V-ing perfect
may I not have been concertising? may you not have been concertising? may she not have been concertising? may we not have been concertising? may you not have been concertising? may they not have been concertising?