1. They told me that I didn't have to do that if I didn't really want to.

Bởi vì câu này phải lùi thì từ HTĐ (don't) thành QKĐ (didn't) do nó ở dạng phủ định

2. He told me that he had seen Jim when he was walking home the day before.

Lùi thì từ  saw--->had seen 

3. Jane asked me whether I would forgive Jim if he apologized to me.

Lùi thì từ will---> would

4. I told Jane that Peter had been a friends of mine for 3 years.

Lùi thì has been---> had been

5. Jim wondered if he would be capable of winning that contest.

Lùi thì will---> would

6. John said that there had been  a serious car accident right there the week before.

Lùi thì  was---> had been

7. Jane told me he was frustrated that Jim forgot their date the day before.

Lùi thì am--->was

8. Peter said it was the first time he had been to NYC

Lùi thì  is--->was

9.. Mr. Brown told his wife that their children had grown up so she didn't have to care much about them.

Lùi thì have---> had

10. Peter asked me what I would do if I won a lottery.

lùi thì will---> would

$\text{1.They told me that I didn't have to do that if didn't really want to.}$

They told me that I didn't have to do that if I didn't really want to.

$\Rightarrow$ Họ nói với tôi rằng tôi không cần phải làm điều đó nếu tôi không thực sự muốn.

$\text{2.He told me that he had seen Jim when was walking home the day before}$

He told me that he had seen Jim when was walking home the day before.

$\Rightarrow$ Anh ấy nói với tôi rằng anh ấy đã nhìn thấy Jim khi đang đi bộ về nhà một ngày trước đó.

$\text{3.Jane asked me whether I would forgive Jim }$

Jane asked me whether I would forgive Jim

$\Rightarrow$ Jane hỏi tôi liệu tôi có tha thứ cho Jim không

$\text{4.I told Jane that Peter had been friends of mine for 3 years.}$

I told Jane that Peter had been friends of mine for 3 years

$\Rightarrow$ Tôi nói với Jane rằng Peter đã là bạn của tôi trong 3 năm

$\text{5.Jim wondered if he would be capable of winning that contest.}$

Jim wondered if he would be capable of winning that contest

$\Rightarrow$ Jim tự hỏi liệu anh ấy có khả năng chiến thắng cuộc thi đó không

$\text{6.John said that there had been a serious car accident right}$

$\text{the week before.}$

John said that there had been  a serious car accident right there the week before.

$\Rightarrow$ John nói rằng đã có một vụ tai nạn xe hơi nghiêm trọng ngay tại đó một tuần trước đó.

$\text{7.Jane told me was frustrated that Jim forgot their date the day before.}$

Jane told me was frustrated that Jim forgot their date the day before.

$\Rightarrow$ Jane nói với tôi rất thất vọng vì Jim đã quên ngày tháng trước đó của họ.

$\text{8.Peter said it was the first time he had been to NYC.}$

Peter said it was the first time he had been to NYC.

$\Rightarrow$ Peter cho biết đây là lần đầu tiên anh đến NYC.

$\text{9.Mr.Brown told his wife that their children had grown up so she }$

$\text{didn't have to care much about them.}$

Mr. Brown told his wife that their children had grown up so she didn't have to care much about them.

$\Rightarrow$ Ông Brown nói với vợ rằng các con của họ đã lớn nên bà không cần quan tâm nhiều đến chúng.

$\text{10.Peter asked me what I would do if I won a lottery.}$

Peter asked me what I would do if I won a lottery.

$\Rightarrow$ Peter hỏi tôi rằng tôi sẽ làm gì nếu tôi trúng số.