
Irregular verb: strive - strived - striven
Simple form | V-ing form | 
| I may strive you may strive she may strive we may strive you may strive they may strive  | I may be striving you may be striving she may be striving we may be striving you may be striving they may be striving  | 
Perfect | V-ing perfect | 
| I may have striven you may have striven she may have striven we may have striven you may have striven they may have striven  | I may have been striving you may have been striving she may have been striving we may have been striving you may have been striving they may have been striving  | 
Simple form | V-ing form | 
| I mayn't strive you mayn't strive she mayn't strive we mayn't strive you mayn't strive they mayn't strive  | I mayn't be striving you mayn't be striving she mayn't be striving we mayn't be striving you mayn't be striving they mayn't be striving  | 
Perfect | V-ing perfect | 
| I mayn't have striven you mayn't have striven she mayn't have striven we mayn't have striven you mayn't have striven they mayn't have striven  | I mayn't have been striving you mayn't have been striving she mayn't have been striving we mayn't have been striving you mayn't have been striving they mayn't have been striving  | 
Simple form | V-ing form | 
| may I strive? may you strive? may she strive? may we strive? may you strive? may they strive?  | may I be striving? may you be striving? may she be striving? may we be striving? may you be striving? may they be striving?  | 
Perfect | V-ing perfect | 
| may I have striven? may you have striven? may she have striven? may we have striven? may you have striven? may they have striven?  | may I have been striving? may you have been striving? may she have been striving? may we have been striving? may you have been striving? may they have been striving?  | 
Simple form | V-ing form | 
| mayn't I strive? mayn't you strive? mayn't she strive? mayn't we strive? mayn't you strive? mayn't they strive?  | mayn't I be striving? mayn't you be striving? mayn't she be striving? mayn't we be striving? mayn't you be striving? mayn't they be striving?  | 
Perfect | V-ing perfect | 
| mayn't I have striven? mayn't you have striven? mayn't she have striven? mayn't we have striven? mayn't you have striven? mayn't they have striven?  | mayn't I have been striving? mayn't you have been striving? mayn't she have been striving? mayn't we have been striving? mayn't you have been striving? mayn't they have been striving?  |