`48`. She said that she was working in a restaurant, and didn't care much for it.

- Câu tường thuật: S1 + said + that + S2 + V lùi thì 

- is/am/are going to `->` was/were going to

`49`. I haven't spoken to her for two years.

- It's + thời gian + since + S + (last) + V2/ed

= S + have/has + not + Vpp + for + khoảng thời gian

`50`. It is interesting to go swimming in the river in the summer.

- N/Ving + be + adj = It + be + adj + to V

`48.` She said she was working in a restaurant and didn't care much for it

`-` Câu tường thuật dạng câu kể: S + said + (that) + S + V

`->` Câu trực tiếp thì HTHT `->` Câu gián tiếp thì QKTD

`+` Cấu trúc thì QKTD: S + was/ were + Ving

`-` She là số ít `->` was

`->` Câu trực tiếp thì HTĐ `->` Câu gián tiếp thì QKĐ

`+` Cấu trúc thì QKĐ (phủ định): S + didn't + V 

`-` I `->` She 

`49.` I haven't spoken to her for two years 

`-` Cấu trúc: It is + khoảng thời gian + since + S + last + V2/ed

`=` S + have/ has + not + VpII + for + khoảng thời gian

`-` I là ngôi thứ nhất `->` have

`50.` It is interesting to go swimming in the summer

`-` Cấu trúc: It is + adj + (for sb) to do sth..: thật .. cho ai đó làm gì