Помогите пожалуйста а то завтра уничтожат)Paraphrase  the sentences using past

Помогите пожалуйста а то завтра убьют)

Paraphrase the sentences using past perfect.

Example: I went to see Boris, but he wasn't in ( to go out)

I went to see Boris, but he had gone out.

1) I saw Helen yesterday, she was the same as before ( not to change a bit).

2) Mum gave me a sandwich to eat but I wasn't hungry ( to have breakfast).

3) We wanted to go to country by car but we couldnt ( to break down).

4) I was going to do the flat but it was clean thanks to my sister ( to clean the flat).

5) When I came home and wanted to help my mum, the dinner was on the table ( to cook dinner).