| Simple | Progressive | Perfect | Progressive |
| Present |
| I occur |
| you occur |
| he/she/it occurs |
| we occur |
| you all occur |
| they occur |
|
| I am occurring |
| you are occurring |
| he/she/it is occurring |
| we are occurring |
| you all are occurring |
| they are occurring |
|
| I have occurred |
| you have occurred |
| he/she/it has occurred |
| we have occurred |
| you all have occurred |
| they have occurred |
|
| I have been occurring |
| you have been occurring |
| he/she/it has been occurring |
| we have been occurring |
| you all have been occurring |
| they have been occurring |
|
| Past |
| I occurred |
| you occurred |
| he/she/it occurred |
| we occurred |
| you all occurred |
| they occurred |
|
| I was occurring |
| you were occurring |
| he/she/it was occurring |
| we were occurring |
| you all were occurring |
| they were occurring |
|
| I had occurred |
| you had occurred |
| he/she/it had occurred |
| we had occurred |
| you all had occurred |
| they had occurred |
|
| I had been occurring |
| you had been occurring |
| he/she/it had been occurring |
| we had been occurring |
| you all had been occurring |
| they had been occurring |
|
| Future |
| I will occur |
| you will occur |
| he/she/it will occur |
| we will occur |
| you all will occur |
| they will occur |
|
| I will be occurring |
| you will be occurring |
| he/she/it will be occurring |
| we are occurring |
| you all will be occurring |
| they will be occurring |
|
| I will have occurred |
| you will have occurred |
| he/she/it will have occurred |
| we will have occurred |
| you all will have occurred |
| they will have occurred |
|
| I will have been occurring |
| you will have been occurring |
| he/she/it will have been occurring |
| we will have been occurring |
| you all will have been occurring |
| they will have been occurring |
|
