| 1. | Base Form (Infinitive): | Surmise |
| 2. | Simple Past: | Surmised |
| 3. | Past Participle: | Surmised |
| 4. | Present Participle: | Surmising |
| 5. | 3rd Person Singular: | Surmises |

Surmise past tense
| Surmised |
| Surmised is the past tense of the word surmise. |
Surmise past participle
| Surmised |
| Surmised is the past participle of the word surmise. |
Surmise verb forms V1 V2 V3 V4
| Infinitive | Past Simple | Past Participle | Present Participle |
|---|---|---|---|
| Surmise | Surmised | Surmised | Surmising |
Conjugation of Surmise
| Simple / Indefinite Present Tense |
| I surmise. |
| He/She/It surmises. |
| You/We/They surmise. |
| Simple Past Tense |
| I surmised. |
| He/She/It surmised. |
| You/We/They surmised. |
| Simple Future Tense |
| I will/shall surmise. |
| He/She/It will surmise. |
| You/We/They will/shall surmise. |
| Present Continuous Tense |
| I am surmising. |
| He/She/It is surmising. |
| You/We/They are surmising. |
| Past Continuous Tense |
| I was surmising. |
| He/She/It was surmising. |
| You/We/They were surmising. |
| Future Continuous Tense |
| I will be surmising. |
| He/She/It will be surmising. |
| You/We/They will be surmising. |
| Present Perfect Tense |
| I have surmised. |
| He/She/It has surmised. |
| You/We/They have surmised. |
| Past Perfect Tense |
| I had surmised. |
| He/She/It had surmised. |
| You/We/They had surmised. |
| Future Perfect Tense |
| I will have surmised. |
| He/She/It will have surmised. |
| You/We/They will have surmised. |
| Present Perfect Continuous Tense |
| I have been surmising. |
| He/She/It has been surmising. |
| You/We/They have been surmising. |
| Past Perfect Continuous Tense |
| I had been surmising. |
| He/She/It had been surmising. |
| You/We/They had been surmising. |
| Future Perfect Continuous Tense |
| I will have been surmising. |
| He/She/It will have been surmising. |
| You/We/They will have been surmising. |
More verb past tense