15. "I don’t think your father likes me", said the young wife. "You mustn’t think that", said her husband; "it is just that he is old and finds it hard to get used to new people". (Leave mustn’t be unchanged).

 I said I think your father doesn't like me. Her husband said you hadn't thought that, he is old and finds it hard to get used to new people.

16. "The steak is overdone again. I’m not complaining; I’m just pointing it out", said her husband.
I said to my husband the steak is overdone again. I’m not complaining; I’m just pointing it out.

17. "They couldn’t open the safe on the spot so they carried it away with them", the night watchman reported.
The night watchman reported they couldn't open the safe on the spot so they had carried it away with them.
18. "If you saw my father, you’d recognize him at once. He is the most extraordinary-looking man", she said to me.
She told me if I have seen her father, I would have recognized him at once. He is a most extraordinary-looking man.

 19. "I found an old Roman coin in the garden yesterday", he said, "and I’m going to take it to the museum this afternoon".
He said that he found an old Roman coin in the garden the previous day and he was going to take it to the museum this afternoon.

20. He said, "I got out of my boat, leaving the engine running, but while I was standing on the quay the gears suddenly engaged themselves and the boat went straight out of the harbor with no one on board".
He said that he had got out of the boat, leaving the engine running, but while he had been standing on the quay the gears suddenly had engaged themselves and the boat had gone straight out of the harbor with no one on board.

21. Then Macbeth enters and says, "I have done the deed".
Then Macbeth entered and said that he had done the deed.

19. "I found an old Roman coin in the garden yesterday", he said, "and I’m going to take it to the museum this afternoon".
=>He said that he found an old Roman coin in the garden the previous day and he was going to take it to the museum this afternoon.
18. "If you saw my father, you’d recognize him at once. He is the most extraordinary- looking man", she said to me.
=>She told me if I have seen her father, I would have recognize him at once. He is a most extraordinary looking man.
17. "They couldn’t open the safe on the spot so they carried it away with them", the night watchman reported.
=>The night watchman reported they couldn't open the safe on the spot so they had carried it away with them.
16. "The steak is overdone again. I’m not complaining; I’m just pointing it out", said her husband.
=>I said to my husband the steak is overdone again. I’m not complaining; I’m just pointing it out.
15. "I don’t think your father likes me", said the young wife. "You mustn’t think that", said her husband; "it is just that he is old and finds it hard to get used to new people". (Leave mustn’t unchanged).
=> I said i think your father doesn't likes me. Her husband said you hadn't think that, he is old and finds it hard to get used to new people.