English verb conjugation
MAY CONCENTRATE

Regular verb: concentrate - concentrated - concentrated

Affirmation

Simple form	V-ing form
I may concentrate you may concentrate he may concentrate we may concentrate you may concentrate they may concentrate	I may be concentrating you may be concentrating he may be concentrating we may be concentrating you may be concentrating they may be concentrating
Perfect	V-ing perfect
I may have concentrated you may have concentrated he may have concentrated we may have concentrated you may have concentrated they may have concentrated	I may have been concentrating you may have been concentrating he may have been concentrating we may have been concentrating you may have been concentrating they may have been concentrating

Negation

Simple form	V-ing form
I may not concentrate you may not concentrate he may not concentrate we may not concentrate you may not concentrate they may not concentrate	I may not be concentrating you may not be concentrating he may not be concentrating we may not be concentrating you may not be concentrating they may not be concentrating
Perfect	V-ing perfect
I may not have concentrated you may not have concentrated he may not have concentrated we may not have concentrated you may not have concentrated they may not have concentrated	I may not have been concentrating you may not have been concentrating he may not have been concentrating we may not have been concentrating you may not have been concentrating they may not have been concentrating

Interrogative form

Simple form	V-ing form
may I concentrate? may you concentrate? may he concentrate? may we concentrate? may you concentrate? may they concentrate?	may I be concentrating? may you be concentrating? may he be concentrating? may we be concentrating? may you be concentrating? may they be concentrating?
Perfect	V-ing perfect
may I have concentrated? may you have concentrated? may he have concentrated? may we have concentrated? may you have concentrated? may they have concentrated?	may I have been concentrating? may you have been concentrating? may he have been concentrating? may we have been concentrating? may you have been concentrating? may they have been concentrating?

Interro-negative form

Simple form	V-ing form
may I not concentrate? may you not concentrate? may he not concentrate? may we not concentrate? may you not concentrate? may they not concentrate?	may I not be concentrating? may you not be concentrating? may he not be concentrating? may we not be concentrating? may you not be concentrating? may they not be concentrating?
Perfect	V-ing perfect
may I not have concentrated? may you not have concentrated? may he not have concentrated? may we not have concentrated? may you not have concentrated? may they not have concentrated?	may I not have been concentrating? may you not have been concentrating? may he not have been concentrating? may we not have been concentrating? may you not have been concentrating? may they not have been concentrating?