| Present Tense | Past Tense | Future Tense |
|---|---|---|
| I blacken | I blackened | I shall/will blacken |
| We blacken | We blackened | We shall/will blacken |
| You blacken | You blackened | You will blacken |
| He blackens | He blackened | He will blacken |
| She blackens | She blackened | She will blacken |
| It blackens | It blackened | It will blacken |
| They blacken | They blackened | They will blacken |
| Present Continuous | Past Continuous | Future Continuous |
|---|---|---|
| I am blackening | I was blackening | I shall/will be blackening |
| We are blackening | We were blackening | We shall/will be blackening |
| You are blackening | You were blackening | You will be blackening |
| He is blackening | He was blackening | He will be blackening |
| She is blackening | She was blackening | She will be blackening |
| It is blackening | It was blackening | It will be blackening |
| They are blackening | They were blackening | They will be blackening |
| Present Perfect | Past Perfect | Future Perfect |
|---|---|---|
| I have Blackened | I had Blackened | I shall/will have Blackened |
| We have Blackened | We had Blackened | We shall/will have Blackened |
| You have Blackened | You had Blackened | You will have Blackened |
| He has Blackened | He had Blackened | He will have Blackened |
| She has Blackened | She had Blackened | She will have Blackened |
| It has Blackened | It had Blackened | It will have Blackened |
| They have Blackened | They had Blackened | They will have Blackened |
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous |
|---|---|---|
| I have been blackening | I had been blackening | I shall/will have been blackening |
| We have been blackening | We had been blackening | We shall/will have been blackening |
| You have been blackening | You had been blackening | You will have been blackening |
| He has been blackening | He had been blackening | He will have been blackening |
| She has been blackening | She had been blackening | She will have been blackening |
| It has been blackening | It had been blackening | It will have been blackening |
| They have been blackening | They had been blackening | They will have been blackening |