6. John said to Mary, "She is ready to go with us"

=> John said to Mary that she was ready to go with them

7. She said to me , "they do not know you"

=> She said to me that they didn't know you

8. He said, "I shall answer the phone"

=> He said he would answer the phone

9. She said to them, "You can do it if you try"

=>  She said to them that they could do it if they try

10. He said, "He has done his homework well"

=> He said he had done his homework well