| Present Tense | Past Tense | Future Tense |
|---|---|---|
| I double | I doubled | I shall/will double |
| We double | We doubled | We shall/will double |
| You double | You doubled | You will double |
| He doubles | He doubled | He will double |
| She doubles | She doubled | She will double |
| It doubles | It doubled | It will double |
| They double | They doubled | They will double |
| Present Continuous | Past Continuous | Future Continuous |
|---|---|---|
| I am doubling | I was doubling | I shall/will be doubling |
| We are doubling | We were doubling | We shall/will be doubling |
| You are doubling | You were doubling | You will be doubling |
| He is doubling | He was doubling | He will be doubling |
| She is doubling | She was doubling | She will be doubling |
| It is doubling | It was doubling | It will be doubling |
| They are doubling | They were doubling | They will be doubling |
| Present Perfect | Past Perfect | Future Perfect |
|---|---|---|
| I have doubled | I had doubled | I shall/will have doubled |
| We have doubled | We had doubled | We shall/will have doubled |
| You have doubled | You had doubled | You will have doubled |
| He has doubled | He had doubled | He will have doubled |
| She has doubled | She had doubled | She will have doubled |
| It has doubled | It had doubled | It will have doubled |
| They have doubled | They had doubled | They will have doubled |
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous |
|---|---|---|
| I have been doubling | I had been doubling | I shall/will have been doubling |
| We have been doubling | We had been doubling | We shall/will have been doubling |
| You have been doubling | You had been doubling | You will have been doubling |
| He has been doubling | He had been doubling | He will have been doubling |
| She has been doubling | She had been doubling | She will have been doubling |
| It has been doubling | It had been doubling | It will have been doubling |
| They have been doubling | They had been doubling | They will have been doubling |