МОЖЕТЕ ПРОВЕРИТЬ НА ПРАВИЛЬНОСТЬ ?
-Hi,I have some bad news

-What's happened?

-My mum found out that l have only bad marks ( как сказать по истории?) She said that if l don't get good marks(через 2 недели ) I will be punished.

-Oh,no! You need to correct your marks faster ( ты должна быстрее исправлять свои оценки) because I will celebrate my birthday in a week( через неделю).

-l know, I'm afraid that I can't get a good marks on time.

-Can I help you?

-No, I should to teach history myself.

-I know, you can to correct your marks !
- I will try
-Good luck

То есть все правильно так ?

в общем да, но я исправила некоторые выражения и убрала частицу TO перед глаголами где это не нужно

Спасибо

не за что

-Hi,I have some bad news-What's happened?-My mum has found out that l have only bad marks at History. She said that if l don't get good marks in two  weeks  I will be punished.-Oh,no! You need to correct your marks faster ( ты должна быстрее исправлять свои оценки) because I will celebrate my birthday next  week-l know, I'm afraid that I can't get a good marks on time.-Can I help you?-No, I should learn History myself.-I know, you can  correct your marks !- I will try-Good luck