Regular verb: strengthen - strengthened - strengthened
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 |
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 |
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? |
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? |