Regular verb: contribute - contributed - contributed
Simple form | V-ing form |
I may contribute you may contribute he may contribute we may contribute you may contribute they may contribute | I may be contributing you may be contributing he may be contributing we may be contributing you may be contributing they may be contributing |
Perfect | V-ing perfect |
I may have contributed you may have contributed he may have contributed we may have contributed you may have contributed they may have contributed | I may have been contributing you may have been contributing he may have been contributing we may have been contributing you may have been contributing they may have been contributing |
Simple form | V-ing form |
I mayn't contribute you mayn't contribute he mayn't contribute we mayn't contribute you mayn't contribute they mayn't contribute | I mayn't be contributing you mayn't be contributing he mayn't be contributing we mayn't be contributing you mayn't be contributing they mayn't be contributing |
Perfect | V-ing perfect |
I mayn't have contributed you mayn't have contributed he mayn't have contributed we mayn't have contributed you mayn't have contributed they mayn't have contributed | I mayn't have been contributing you mayn't have been contributing he mayn't have been contributing we mayn't have been contributing you mayn't have been contributing they mayn't have been contributing |
Simple form | V-ing form |
may I contribute? may you contribute? may he contribute? may we contribute? may you contribute? may they contribute? | may I be contributing? may you be contributing? may he be contributing? may we be contributing? may you be contributing? may they be contributing? |
Perfect | V-ing perfect |
may I have contributed? may you have contributed? may he have contributed? may we have contributed? may you have contributed? may they have contributed? | may I have been contributing? may you have been contributing? may he have been contributing? may we have been contributing? may you have been contributing? may they have been contributing? |
Simple form | V-ing form |
mayn't I contribute? mayn't you contribute? mayn't he contribute? mayn't we contribute? mayn't you contribute? mayn't they contribute? | mayn't I be contributing? mayn't you be contributing? mayn't he be contributing? mayn't we be contributing? mayn't you be contributing? mayn't they be contributing? |
Perfect | V-ing perfect |
mayn't I have contributed? mayn't you have contributed? mayn't he have contributed? mayn't we have contributed? mayn't you have contributed? mayn't they have contributed? | mayn't I have been contributing? mayn't you have been contributing? mayn't he have been contributing? mayn't we have been contributing? mayn't you have been contributing? mayn't they have been contributing? |