| 1. | Base Form (Infinitive): | Undergo |
| 2. | Simple Past: | Underwent |
| 3. | Past Participle: | Undergone |
| 4. | Present Participle: | Undergoing |
| 5. | 3rd Person Singular: | Undergoes |

Undergo past tense
| Underwent |
| Underwent is the past tense of the word undergo. |
Undergo past participle
| Undergone |
| Undergone is the past participle of the word undergo. |
Undergo verb forms V1 V2 V3 V4
| Infinitive | Past Simple | Past Participle | Present Participle |
|---|---|---|---|
| Undergo | Underwent | Undergone | Undergoing |
Conjugation of Undergo
| Simple / Indefinite Present Tense |
| I undergo. |
| He/She/It undergoes. |
| You/We/They undergo. |
| Simple Past Tense |
| I underwent. |
| He/She/It underwent. |
| You/We/They underwent. |
| Simple Future Tense |
| I will/shall undergo. |
| He/She/It will undergo. |
| You/We/They will/shall undergo. |
| Present Continuous Tense |
| I am undergoing. |
| He/She/It is undergoing. |
| You/We/They are undergoing. |
| Past Continuous Tense |
| I was undergoing. |
| He/She/It was undergoing. |
| You/We/They were undergoing. |
| Future Continuous Tense |
| I will be undergoing. |
| He/She/It will be undergoing. |
| You/We/They will be undergoing. |
| Present Perfect Tense |
| I have undergone. |
| He/She/It has undergone. |
| You/We/They have undergone. |
| Past Perfect Tense |
| I had undergone. |
| He/She/It had undergone. |
| You/We/They had undergone. |
| Future Perfect Tense |
| I will have undergone. |
| He/She/It will have undergone. |
| You/We/They will have undergone. |
| Present Perfect Continuous Tense |
| I have been undergoing. |
| He/She/It has been undergoing. |
| You/We/They have been undergoing. |
| Past Perfect Continuous Tense |
| I had been undergoing. |
| He/She/It had been undergoing. |
| You/We/They had been undergoing. |
| Future Perfect Continuous Tense |
| I will have been undergoing. |
| He/She/It will have been undergoing. |
| You/We/They will have been undergoing. |