Regular verb: concentrate - concentrated - concentrated
Simple form | V-ing form |
I may concentrate you may concentrate she may concentrate we may concentrate you may concentrate they may concentrate | I may be concentrating you may be concentrating she 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 she 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 she may have been concentrating we may have been concentrating you may have been concentrating they may have been concentrating |
Simple form | V-ing form |
I may not concentrate you may not concentrate she 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 she 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 she 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 she may not have been concentrating we may not have been concentrating you may not have been concentrating they may not have been concentrating |
Simple form | V-ing form |
may I concentrate? may you concentrate? may she concentrate? may we concentrate? may you concentrate? may they concentrate? | may I be concentrating? may you be concentrating? may she 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 she 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 she have been concentrating? may we have been concentrating? may you have been concentrating? may they have been concentrating? |
Simple form | V-ing form |
may I not concentrate? may you not concentrate? may she 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 she 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 she 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 she not have been concentrating? may we not have been concentrating? may you not have been concentrating? may they not have been concentrating? |