| Simple | Progressive | Perfect | Progressive |
| Present |
| I straighten |
| you straighten |
| he/she/it straightens |
| we straighten |
| you all straighten |
| they straighten |
|
| I am straightening |
| you are straightening |
| he/she/it is straightening |
| we are straightening |
| you all are straightening |
| they are straightening |
|
| I have straightened |
| you have straightened |
| he/she/it has straightened |
| we have straightened |
| you all have straightened |
| they have straightened |
|
| I have been straightening |
| you have been straightening |
| he/she/it has been straightening |
| we have been straightening |
| you all have been straightening |
| they have been straightening |
|
| Past |
| I straightened |
| you straightened |
| he/she/it straightened |
| we straightened |
| you all straightened |
| they straightened |
|
| I was straightening |
| you were straightening |
| he/she/it was straightening |
| we were straightening |
| you all were straightening |
| they were straightening |
|
| I had straightened |
| you had straightened |
| he/she/it had straightened |
| we had straightened |
| you all had straightened |
| they had straightened |
|
| I had been straightening |
| you had been straightening |
| he/she/it had been straightening |
| we had been straightening |
| you all had been straightening |
| they had been straightening |
|
| Future |
| I will straighten |
| you will straighten |
| he/she/it will straighten |
| we will straighten |
| you all will straighten |
| they will straighten |
|
| I will be straightening |
| you will be straightening |
| he/she/it will be straightening |
| we are straightening |
| you all will be straightening |
| they will be straightening |
|
| I will have straightened |
| you will have straightened |
| he/she/it will have straightened |
| we will have straightened |
| you all will have straightened |
| they will have straightened |
|
| I will have been straightening |
| you will have been straightening |
| he/she/it will have been straightening |
| we will have been straightening |
| you all will have been straightening |
| they will have been straightening |
|
