| 1. | Base Form (Infinitive): | Open |
| 2. | Simple Past: | Opened |
| 3. | Past Participle: | Opened |
| 4. | Present Participle: | Opening |
| 5. | 3rd Person Singular: | Opens |

Open past tense
| Opened |
| Opened is the past tense of the word open. |
Open past participle
| Opened |
| Opened is the past participle of the word open. |
Open verb forms V1 V2 V3 V4
| Infinitive | Past Simple | Past Participle | Present Participle |
|---|---|---|---|
| Open | Opened | Opened | Opening |
Conjugation of Open
| Simple / Indefinite Present Tense |
| I open the door. |
| He/She/It opens the door. |
| You/We/They open the door. |
| Simple Past Tense |
| I opened the door. |
| He/She/It opened the door. |
| You/We/They opened the door. |
| Simple Future Tense |
| I will/shall open the door. |
| He/She/It will open the door. |
| You/We/They will/shall open the door. |
| Present Continuous Tense |
| I am opening the door. |
| He/She/It is opening the door. |
| You/We/They are opening the door. |
| Past Continuous Tense |
| I was opening the door. |
| He/She/It was opening the door. |
| You/We/They were opening the door. |
| Future Continuous Tense |
| I will be opening the door. |
| He/She/It will be opening the door. |
| You/We/They will be opening the door. |
| Present Perfect Tense |
| I have opened the door. |
| He/She/It has opened the door. |
| You/We/They have opened the door. |
| Past Perfect Tense |
| I had opened the door. |
| He/She/It had opened the door. |
| You/We/They had opened the door. |
| Future Perfect Tense |
| I will have opened the door. |
| He/She/It will have opened the door. |
| You/We/They will have opened the door. |
| Present Perfect Continuous Tense |
| I have been opening the door. |
| He/She/It has been opening the door. |
| You/We/They have been opening the door. |
| Past Perfect Continuous Tense |
| I had been opening the door. |
| He/She/It had been opening the door. |
| You/We/They had been opening the door. |
| Future Perfect Continuous Tense |
| I will have been opening the door. |
| He/She/It will have been opening the door. |
| You/We/They will have been opening the door. |