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