Devoir Maison : Phrases à corriger comportant un erreur grammaticale

Sujet du devoir

Bonjour
Je dois corriger des phrases qui comportent toute une erreur grammaticale. Voici les phrases :
1.He thought that the life would be better there.
2.The Peter's room is very dark.
3.He told to me that it was no use trying.
4.She wondered whether he can help her.
5.The flowers was big as an orange.
6.You mustn't wear a tie, you know. It's not necessary.
7.His wife was in hospital during six days.
8.We'we had them since three month.
9.They left home there are two years.
10.I think it's time you stop working.

Où j'en suis dans mon devoir

J'ai déjà trouvé quelques erreurs mais je fais moi même beaucoup d'erreur j'ai du mal à les retrouver. Si vous pouviez m'aider.
J'ai déjà trouver celles-ci :
2. Peter's room is very dark (sans le THE)
8.We'we had them FOR three month.

Ce devoir maisons est à rendre pour le