Infinitive: to grind
Participle: ground
Gerund: grinding
| I | grind |
| you | grind |
| he;she;it | grinds |
| we | grind |
| you | grind |
| they | grind |
| I | have ground; grinded |
| you | have ground; grinded |
| he;she;it | has ground; grinded |
| we | have ground; grinded |
| you | have ground; grinded |
| they | have ground; grinded |
| I | ground |
| you | ground |
| he;she;it | ground |
| we | ground |
| you | ground |
| they | ground |
| I | had ground; grinded |
| you | had ground; grinded |
| he;she;it | had ground; grinded |
| we | had ground; grinded |
| you | had ground; grinded |
| they | had ground; grinded |
| I | will grind |
| you | will grind |
| he;she;it | will grind |
| we | will grind |
| you | will grind |
| they | will grind |
| I | will have ground; grinded |
| you | will have ground; grinded |
| he;she;it | will have ground; grinded |
| we | will have ground; grinded |
| you | will have ground; grinded |
| they | will have ground; grinded |
| I | grind |
| you | grind |
| he;she;it | grind |
| we | grind |
| you | grind |
| they | grind |
| I | have ground; grinded |
| you | have ground; grinded |
| he;she;it | have ground; grinded |
| we | have ground; grinded |
| you | have ground; grinded |
| they | have ground; grinded |
| I | ground |
| you | ground |
| he;she;it | ground |
| we | ground |
| you | ground |
| they | ground |
| I | had ground; grinded |
| you | had ground; grinded |
| he;she;it | had ground; grinded |
| we | had ground; grinded |
| you | had ground; grinded |
| they | had ground; grinded |
| I | would grind |
| you | would grind |
| he;she;it | would grind |
| we | would grind |
| you | would grind |
| they | would grind |
| I | would have ground; grinded |
| you | would have ground; grinded |
| he;she;it | would have ground; grinded |
| we | would have ground; grinded |
| you | would have ground; grinded |
| they | would have ground; grinded |
| you | grind |
| we | Let's grind |
| you | grind |
| I | am grinding |
| you | are grinding |
| he;she;it | is grinding |
| we | are grinding |
| you | are grinding |
| they | are grinding |
| I | have been grinding |
| you | have been grinding |
| he;she;it | has been grinding |
| we | have been grinding |
| you | have been grinding |
| they | have been grinding |
| I | was grinding |
| you | were grinding |
| he;she;it | was grinding |
| we | were grinding |
| you | were grinding |
| they | were grinding |
| I | had been grinding |
| you | had been grinding |
| he;she;it | had been grinding |
| we | had been grinding |
| you | had been grinding |
| they | had been grinding |
| I | will be grinding |
| you | will be grinding |
| he;she;it | will be grinding |
| we | will be grinding |
| you | will be grinding |
| they | will be grinding |
| I | will have been grinding |
| you | will have been grinding |
| he;she;it | will have been grinding |
| we | will have been grinding |
| you | will have been grinding |
| they | will have been grinding |
| I | would be grinding |
| you | would be grinding |
| he;she;it | would be grinding |
| we | would be grinding |
| you | would be grinding |
| they | would be grinding |
| I | would have been grinding |
| you | would have been grinding |
| he;she;it | would have been grinding |
| we | would have been grinding |
| you | would have been grinding |
| they | would have been grinding |
"This Text holdeth their noses so hard to the grindstone, that it clean disfigureth their Faces." [Frith, "Mirror to know Thyself," 1532]The main modern (reflective) sense of "work hard" is from 1828.