| Simple | Progressive | Perfect | Progressive |
| Present |
| I slack |
| you slack |
| he/she/it slacks |
| we slack |
| you all slack |
| they slack |
|
| I am slacking |
| you are slacking |
| he/she/it is slacking |
| we are slacking |
| you all are slacking |
| they are slacking |
|
| I have slacked |
| you have slacked |
| he/she/it has slacked |
| we have slacked |
| you all have slacked |
| they have slacked |
|
| I have been slacking |
| you have been slacking |
| he/she/it has been slacking |
| we have been slacking |
| you all have been slacking |
| they have been slacking |
|
| Past |
| I slacked |
| you slacked |
| he/she/it slacked |
| we slacked |
| you all slacked |
| they slacked |
|
| I was slacking |
| you were slacking |
| he/she/it was slacking |
| we were slacking |
| you all were slacking |
| they were slacking |
|
| I had slacked |
| you had slacked |
| he/she/it had slacked |
| we had slacked |
| you all had slacked |
| they had slacked |
|
| I had been slacking |
| you had been slacking |
| he/she/it had been slacking |
| we had been slacking |
| you all had been slacking |
| they had been slacking |
|
| Future |
| I will slack |
| you will slack |
| he/she/it will slack |
| we will slack |
| you all will slack |
| they will slack |
|
| I will be slacking |
| you will be slacking |
| he/she/it will be slacking |
| we are slacking |
| you all will be slacking |
| they will be slacking |
|
| I will have slacked |
| you will have slacked |
| he/she/it will have slacked |
| we will have slacked |
| you all will have slacked |
| they will have slacked |
|
| I will have been slacking |
| you will have been slacking |
| he/she/it will have been slacking |
| we will have been slacking |
| you all will have been slacking |
| they will have been slacking |
|
