`A`nswer : 

`1.` She told me that I had to report the accident to the policeman

`-` Must `->` Had to

`2.` He told her that she should read that magazine the previous day

`3.` My parents said that they would phone me when they got back

`4.` Peter told me that my English could be improved very quickly because I was working so hard that semester

`5.` The couple said that they couldn't manage their business successfully without her father’s money

`6.` The customer said that they wouldn’t leave until they saw the manager.

`7.` Peter told her that he would arrive before his brother came to the airport.

`8.` Mary told Jack that she couldn’t go to his birthday party the following Saturday evening.

`9.` She said that her biggest aunt might drop by and have dinner at her home the next day.

`10.` The teacher told us that they could collect old books for the poor students in their area.

$------------------$

`-` Cấu trúc câu tường thuật :

`->` S `+` asked `+` if /whether `+` S `+` V (lùi thì)

`-` S `+` told/asked/said `+` if `+` S `+` V(lùi thì)..

`->` S `+` asked `+` O `+` Wh- `+` S `+` V (lùi thì)

`->` S `+` asked/inquired/wondered, wanted to know `+` if/whether `+` S `+` V.

`-` Lùi thì

`+` Thì quá khứ đơn `->` Thì quá khứ hoàn thành

`+` Thì hiện tại đơn `->` Thì quá khứ đơn

`+` Thì hiện tại hoàn thành `->` Thì quá khứ hoàn thành

`+` Thì hiện tại tiếp diễn `->` Thì quá khứ tiếp diễn

`+` Thì quá khứ tiếp diễn `->` Thì quá khứ hoàn thành tiếp diễn

`+` Thì hiện tại hoàn thành tiếp diễn `->` Thì quá khứ hoàn thành tiếp diễn.

`+` Thì tương lai đơn `->` Thì quá khứ đơn

`+` shall/can/may `->` should / could/ might

`+` should / could/ might/ would/ might `->` giữ nguyên