| Simple | Progressive | Perfect | Progressive |
| Present |
| I observe |
| you observe |
| he/she/it observes |
| we observe |
| you all observe |
| they observe |
|
| I am observing |
| you are observing |
| he/she/it is observing |
| we are observing |
| you all are observing |
| they are observing |
|
| I have observed |
| you have observed |
| he/she/it has observed |
| we have observed |
| you all have observed |
| they have observed |
|
| I have been observing |
| you have been observing |
| he/she/it has been observing |
| we have been observing |
| you all have been observing |
| they have been observing |
|
| Past |
| I observed |
| you observed |
| he/she/it observed |
| we observed |
| you all observed |
| they observed |
|
| I was observing |
| you were observing |
| he/she/it was observing |
| we were observing |
| you all were observing |
| they were observing |
|
| I had observed |
| you had observed |
| he/she/it had observed |
| we had observed |
| you all had observed |
| they had observed |
|
| I had been observing |
| you had been observing |
| he/she/it had been observing |
| we had been observing |
| you all had been observing |
| they had been observing |
|
| Future |
| I will observe |
| you will observe |
| he/she/it will observe |
| we will observe |
| you all will observe |
| they will observe |
|
| I will be observing |
| you will be observing |
| he/she/it will be observing |
| we are observing |
| you all will be observing |
| they will be observing |
|
| I will have observed |
| you will have observed |
| he/she/it will have observed |
| we will have observed |
| you all will have observed |
| they will have observed |
|
| I will have been observing |
| you will have been observing |
| he/she/it will have been observing |
| we will have been observing |
| you all will have been observing |
| they will have been observing |
|
