
Regular verb: back - backed - backed
| Present | Present continuous | Preterite | Preterite continuous | 
| I back you back she backs we back you back they back | I am backing you are backing she is backing we are backing you are backing they are backing | I backed you backed she backed we backed you backed they backed | I was backing you were backing she was backing we were backing you were backing they were backing | 
| Present perfect | Present perfect continuous | Pluperfect | Pluperfect continuous | 
| I have backed you have backed she has backed we have backed you have backed they have backed | I have been backing you have been backing she has been backing we have been backing you have been backing they have been backing | I had backed you had backed she had backed we had backed you had backed they had backed | I had been backing you had been backing she had been backing we had been backing you had been backing they had been backing | 
| Future | Future continuous | Future perfect | Future perfect continuous | 
| I will back you will back she will back we will back you will back they will back | I will be backing you will be backing she will be backing we will be backing you will be backing they will be backing | I will have backed you will have backed she will have backed we will have backed you will have backed they will have backed | I will have been backing you will have been backing she will have been backing we will have been backing you will have been backing they will have been backing | 
| Present | Present continuous | Past | Past continuous | 
| I would back you would back she would back we would back you would back they would back | I would be backing you would be backing she would be backing we would be backing you would be backing they would be backing | I would have backed you would have backed she would have backed we would have backed you would have backed they would have backed | I would have been backing you would have been backing she would have been backing we would have been backing you would have been backing they would have been backing | 
| Infinitive | Imperative | 
| Infinitive | Imperative | ||
| to back | back Let's back back | 
| Present | Past | ||
| backing | backed |