
Irregular verb: undergo - underwent - undergone
Present | Present continuous | Preterite | Preterite continuous | 
| I don't undergo you don't undergo she doesn't undergo we don't undergo you don't undergo they don't undergo  | I'm not undergoing you aren't undergoing she isn't undergoing we aren't undergoing you aren't undergoing they aren't undergoing  | I didn't undergo you didn't undergo she didn't undergo we didn't undergo you didn't undergo they didn't undergo  | I wasn't undergoing you weren't undergoing she wasn't undergoing we weren't undergoing you weren't undergoing they weren't undergoing  | 
Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
| I haven't undergone you haven't undergone she hasn't undergone we haven't undergone you haven't undergone they haven't undergone  | I haven't  been undergoing you haven't been undergoing she hasn't been undergoing we haven't been undergoing you haven't been undergoing they haven't been undergoing  | I hadn't undergone you hadn't undergone she hadn't undergone we hadn't undergone you hadn't undergone they hadn't undergone  | I hadn't been undergoing you hadn't been undergoing she hadn't been undergoing we hadn't been undergoing you hadn't been undergoing they hadn't been undergoing  | 
Future | Future continuous | Future perfect | Future perfect continuous | 
| I won't undergo you won't undergo she won't undergo we won't undergo you won't undergo they won't undergo  | I won't be undergoing you won't be undergoing she won't be undergoing we won't be undergoing you won't be undergoing they won't be undergoing  | I won't have undergone you won't have undergone she won't have undergone we won't have undergone you won't have undergone they won't have undergone  | I won't have been undergoing you won't have been undergoing she won't have been undergoing we won't have been undergoing you won't have been undergoing they won't have been undergoing  | 
Present | Present continuous | Past | Past continuous | 
| I wouldn't undergo you wouldn't undergo she wouldn't undergo we wouldn't undergo you wouldn't undergo they wouldn't undergo  | I wouldn't be undergoing you wouldn't be undergoing she wouldn't be undergoing we wouldn't be undergoing you wouldn't be undergoing they wouldn't be undergoing  | I wouldn't have undergone you wouldn't have undergone she wouldn't have undergone we wouldn't have undergone you wouldn't have undergone they wouldn't have undergone  | I wouldn't have been undergoing you wouldn't have been undergoing she wouldn't have been undergoing we wouldn't have been undergoing you wouldn't have been undergoing they wouldn't have been undergoing  | 
Infinitive | Imperative | 
Infinitive | Imperative | ||
| to undergo | do not undergo Let's not undergo do not undergo  | 
Present | Past | ||
| undergoing | undergone |