Réécris les phrases à la formes passive en anglais. Merci

Réponse :

1) Slaves were forced to work hard by slave owners

2) Cotton was grown on plantations by slaves

3) Slaves were often whipped by overseers

4) Harriet Tubman was beaten by her mistress

5) Harriet Tubman was never found by slave hunters

6) Three hundred slaves were helped by Harriet Tubman

7) Different routes were taken by slaves to escape Slaves States

8) The Ohio River was crossed by many runaway slaves