English verb conjugation
MAY STRENGTHEN

Regular verb: strengthen - strengthened - strengthened

Affirmation

Simple form	V-ing form
I may strengthen you may strengthen she may strengthen we may strengthen you may strengthen they may strengthen	I may be strengthening you may be strengthening she may be strengthening we may be strengthening you may be strengthening they may be strengthening
Perfect	V-ing perfect
I may have strengthened you may have strengthened she may have strengthened we may have strengthened you may have strengthened they may have strengthened	I may have been strengthening you may have been strengthening she may have been strengthening we may have been strengthening you may have been strengthening they may have been strengthening

Negation

Simple form	V-ing form
I mayn't strengthen you mayn't strengthen she mayn't strengthen we mayn't strengthen you mayn't strengthen they mayn't strengthen	I mayn't be strengthening you mayn't be strengthening she mayn't be strengthening we mayn't be strengthening you mayn't be strengthening they mayn't be strengthening
Perfect	V-ing perfect
I mayn't have strengthened you mayn't have strengthened she mayn't have strengthened we mayn't have strengthened you mayn't have strengthened they mayn't have strengthened	I mayn't have been strengthening you mayn't have been strengthening she mayn't have been strengthening we mayn't have been strengthening you mayn't have been strengthening they mayn't have been strengthening

Interrogative form

Simple form	V-ing form
may I strengthen? may you strengthen? may she strengthen? may we strengthen? may you strengthen? may they strengthen?	may I be strengthening? may you be strengthening? may she be strengthening? may we be strengthening? may you be strengthening? may they be strengthening?
Perfect	V-ing perfect
may I have strengthened? may you have strengthened? may she have strengthened? may we have strengthened? may you have strengthened? may they have strengthened?	may I have been strengthening? may you have been strengthening? may she have been strengthening? may we have been strengthening? may you have been strengthening? may they have been strengthening?

Interro-negative form

Simple form	V-ing form
mayn't I strengthen? mayn't you strengthen? mayn't she strengthen? mayn't we strengthen? mayn't you strengthen? mayn't they strengthen?	mayn't I be strengthening? mayn't you be strengthening? mayn't she be strengthening? mayn't we be strengthening? mayn't you be strengthening? mayn't they be strengthening?
Perfect	V-ing perfect
mayn't I have strengthened? mayn't you have strengthened? mayn't she have strengthened? mayn't we have strengthened? mayn't you have strengthened? mayn't they have strengthened?	mayn't I have been strengthening? mayn't you have been strengthening? mayn't she have been strengthening? mayn't we have been strengthening? mayn't you have been strengthening? mayn't they have been strengthening?