English verb conjugation
MAY CONCENTER

Regular verb: concenter - concentered - concentered

Affirmation

Simple form	V-ing form
I may concenter you may concenter he may concenter we may concenter you may concenter they may concenter	I may be concentering you may be concentering he may be concentering we may be concentering you may be concentering they may be concentering
Perfect	V-ing perfect
I may have concentered you may have concentered he may have concentered we may have concentered you may have concentered they may have concentered	I may have been concentering you may have been concentering he may have been concentering we may have been concentering you may have been concentering they may have been concentering

Negation

Simple form	V-ing form
I mayn't concenter you mayn't concenter he mayn't concenter we mayn't concenter you mayn't concenter they mayn't concenter	I mayn't be concentering you mayn't be concentering he mayn't be concentering we mayn't be concentering you mayn't be concentering they mayn't be concentering
Perfect	V-ing perfect
I mayn't have concentered you mayn't have concentered he mayn't have concentered we mayn't have concentered you mayn't have concentered they mayn't have concentered	I mayn't have been concentering you mayn't have been concentering he mayn't have been concentering we mayn't have been concentering you mayn't have been concentering they mayn't have been concentering

Interrogative form

Simple form	V-ing form
may I concenter? may you concenter? may he concenter? may we concenter? may you concenter? may they concenter?	may I be concentering? may you be concentering? may he be concentering? may we be concentering? may you be concentering? may they be concentering?
Perfect	V-ing perfect
may I have concentered? may you have concentered? may he have concentered? may we have concentered? may you have concentered? may they have concentered?	may I have been concentering? may you have been concentering? may he have been concentering? may we have been concentering? may you have been concentering? may they have been concentering?

Interro-negative form

Simple form	V-ing form
mayn't I concenter? mayn't you concenter? mayn't he concenter? mayn't we concenter? mayn't you concenter? mayn't they concenter?	mayn't I be concentering? mayn't you be concentering? mayn't he be concentering? mayn't we be concentering? mayn't you be concentering? mayn't they be concentering?
Perfect	V-ing perfect
mayn't I have concentered? mayn't you have concentered? mayn't he have concentered? mayn't we have concentered? mayn't you have concentered? mayn't they have concentered?	mayn't I have been concentering? mayn't you have been concentering? mayn't he have been concentering? mayn't we have been concentering? mayn't you have been concentering? mayn't they have been concentering?